Problem retrieving target text

Hi,
I have just started working with SDL Trados Studio 2019. I have managed to create projects. I have translated one project and started another and have had the same problem each time: when I want to open the target text (in Word), I get a message saying that it is not possible to open the file because there are problems with its content but what sort of error is not explained only where it is : /word/document.xml, line 2 (for both of them), column (and then a figure that is different). Would you have any idea how not to do the same mistake again (if I have made any) and get my target texts?

Thank you very much!