Import xml file from PorjeQtOr 9.2.2 in Microsoft Project 2008

Hello and thank you for reading my question.
Until July this year, I was exporting xml files with ProjeQtOr version 9.2.1 which my client under Microsoft Project 2008 was able to import without any problem. In August we upgraded to version 9.2.2 which was supposed to bring improvements in exporting to Microsoft Project.
Last week I sent a new export to my client. He told me that he could no longer read the file because Microsoft Project returned a serious error when he opened it.
Have you ever encountered this kind of problem? If so, have you found a way to solve it?

Thank you in advance for your help

Thank you for your answer.
Please find attached the error message my (german) customer have on his screen wenn he try to open the xml document. 
Translation is : The last time "aaa" was opened, this resulted in a serious error. Do you want to continue opening ?

Is this enough to go further in your investigations ?

Hello,
Was the information I sent you sufficient? Have you been able to find a solution to my problem of reading XML files that no longer work on an MS Project 2013 since the last update of ProjeQtOr?
Thank you in advance for your reply.