Last JSM version generates issues when importing exported projects

Hi, I am trying to import projects exported from JSM and from Joomleague, both generate issues now (and not before).
I am testing on a php 5.6 based server and on a php 7.0
What's common between the two is that whatever project I try (JL or JSM exported) it generates issues during importing but it seems to finish the process, but when I go to the templates section, it gives out an empty page on php 5.6 and on php 7 this error:
"Fatal error: Class 'FormField' not found in .../public_html/administrator/components/com_sportsmanagement/models/fields/pagetitleformat.php on line 8"
Maybe diddi is still working on it and it's expected, maybe you didn't know about it...

Fehler ist behoben.
Entschuldigung für diese Unannehmlichkeiten.

Du hast nichts zu entschuldigen wenn du entwickelst

Now it works as before, with some new warnings and an error.
This warning when the import process ends in backend:

Warning: Illegal string offset 'Importare i dati generali del tipo di sport:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1628 Warning: Illegal string offset 'Importa dati generali del campionato: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1698 Warning: Illegal string offset 'Importa dati generali della stagione:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1765 Warning: Illegal string offset 'Importa dati generali di posizioni: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2163 Warning: Illegal string offset 'Importa dati generali del club: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2636 Warning: Illegal string offset 'Importare i dati generali delle squadre: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2923 Warning: Illegal string offset 'Importa dati generali di persone: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3150 Warning: Illegal string offset 'Importare i dati generali del progetto: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3219 Warning: Illegal string offset 'Importa dati generali degli elementi dei progetti:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3974 Warning: Illegal string offset 'Importa dati generali del team del progetto assegnato:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3830 Warning: Illegal string offset 'Importa dati generali delle squadre: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4085 Warning: Illegal string offset 'Importa dati generali del personale della squadra: ' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4202 Warning: Illegal string offset 'Importa dati generali delle partite:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4364 Warning: Illegal string offset 'Importa dati generali degli incontri:' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4687 Warning: Illegal string offset 'setNewDataStructur' in ...public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 6951

This warning when you access the newly imported project on backend:

Warning: simplexml_load_file(): ...public_html/eqp/components/com_sportsmanagement/settings/default/rankingalltime.xml:2: parser error : Start tag expected, '<' not found in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ^ in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ...public_html/eqp/components/com_sportsmanagement/settings/default/rankingallseasons.xml:2: parser error : Start tag expected, '<' not found in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ^ in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ...public_html/eqp/components/com_sportsmanagement/settings/default/matrixedit.xml:2: parser error : Start tag expected, '<' not found in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): in ...public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ^ in ...public_html/eqp/libraries/src/Form

And there's this error when you try to access the teamplan of the imported project (through menu item or link on JSM):

0
syntax error, unexpected '('

I've tried with JSM and Joomleague projects on JSM fresh install, no difference.
Only on php 5.6 there's no error, just blank page...

Bitte noch einmal den Teamplan testen.

Die Warnungen müssten jetzt auch weg sein !

Diddi, now it works! you're a magician!
I've deleted a project and just reimported it, and now the team plan is also ok! Let me tell you about warnings (I don't care about them if import works)

I should mention that I see this warning after import:
Warning: Illegal string offset 'Importare i dati generali del tipo di sport:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1575 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1575 Warning: Illegal string offset 'Importare i dati generali del tipo di sport:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1632 Warning: Illegal string offset 'Importa dati generali del campionato: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1648 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1648 Warning: Illegal string offset 'Importa dati generali del campionato: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1705 Warning: Illegal string offset 'Importa dati generali della stagione:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1721 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1721 Warning: Illegal string offset 'Importa dati generali della stagione:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 1775 Warning: Illegal string offset 'Importa dati generali di posizioni: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2081 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2081 Warning: Illegal string offset 'Importa dati generali di posizioni: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2176 Warning: Illegal string offset 'Importa dati generali del club: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2424 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2424 Warning: Illegal string offset 'Importa dati generali del club: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2652 Warning: Illegal string offset 'Importare i dati generali delle squadre: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2773 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2773 Warning: Illegal string offset 'Importare i dati generali delle squadre: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2942 Warning: Illegal string offset 'Importa dati generali di persone: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2962 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 2962 Warning: Illegal string offset 'Importa dati generali di persone: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3172 Warning: Illegal string offset 'Importare i dati generali del progetto: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3186 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3186 Warning: Illegal string offset 'Importare i dati generali del progetto: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3243 Warning: Illegal string offset 'Importa dati generali degli elementi dei progetti:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3930 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3930 Warning: Illegal string offset 'Importa dati generali degli elementi dei progetti:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4004 Warning: Illegal string offset 'Importa dati generali del team del progetto assegnato:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3674 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3674 Warning: Illegal string offset 'Importa dati generali del team del progetto assegnato:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 3857 Warning: Illegal string offset 'Importa dati generali delle squadre: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4018 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4018 Warning: Illegal string offset 'Importa dati generali delle squadre: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4118 Warning: Illegal string offset 'Importa dati generali del personale della squadra: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4132 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4132 Warning: Illegal string offset 'Importa dati generali del personale della squadra: ' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4238 Warning: Illegal string offset 'Importa dati generali delle partite:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4341 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4341 Warning: Illegal string offset 'Importa dati generali delle partite:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4403 Warning: Illegal string offset 'Importa dati generali degli incontri:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4419 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4419 Warning: Illegal string offset 'Importa dati generali degli incontri:' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 4729 Warning: Illegal string offset 'COM_SPORTSMANAGEMENT_XMLSETNEWDATASTRUCTUR_0' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 6359 Warning: Cannot assign an empty string to a string offset in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 6359 Warning: Illegal string offset 'COM_SPORTSMANAGEMENT_XMLSETNEWDATASTRUCTUR_0' in .../public_html/eqp/administrator/components/com_sportsmanagement/models/jlxmlimport.php on line 6996

I also see a lot of duplicates but maybe it's normal because all the players are still there:
Duplicate entry '1-3-0-1' for key 'combi'
Duplicate entry '2-3-0-1' for key 'combi'...

And when I go to project's template I see this, but only the first time I go there:
Warning: simplexml_load_file(): .../public_html/eqp/components/com_sportsmanagement/settings/default/matrixedit.xml:2: parser error : Start tag expected, '<' not found in .../public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): in .../public_html/eqp/libraries/src/Form/Form.php on line 857 Warning: simplexml_load_file(): ^ in .../public_html/eqp/libraries/src/Form/Form.php on line 857