It looks like one of the implant libraries has wrong-typed characters in the "config.xml" file.
It is important to find the implant library which has the problem.
Specifically "Nobels" implant library seems to be locked.
Make sure your Windows software is up to date and the graphics card has been updated.
If you try to run the software without that library folder, the error message may not appear anymore.
This error should not occur again if the implant libraries are downloaded directly from the Exocad