Hi,
I also had this problem with the new Trados 2024, as quoted by many other users: "Parameter not valid" popped up, then no editing or anything else possible... for a urgent project, of course...
I spent (or better said, lost) 1 hour reading the corresponding posts about this problem. Fortunately, my husband and also IT-specialist recommended to try the font size adaptation, as quoted by Shosaku, and NOT all these time-consuming and fragile workarounds, for example in editing xml-files as mentioned in the various posts. Result: it worked, "just" by putting the font back to "standard" (instead of "Arial") for my language.
To put it politely, I am quite astonished that:
1. I paid nearly 400€ for an update with such a bug
2. This huge problem (Trados totally blocked) is "only" due to a trivial font-drawing problem.
I´ve been working with Trados since 2011, satisfactorily until now. The huge price increase for this late update though is out of proportion, and this bug is unacceptable in my eyes. I will certainly not buy a new update before very long...
Best regards,
Anne