This has only happened after changing to build 130 which I downloaded yesterday being the 22/12/20 which was supposed to be bug fixed!!
I couldn't uninstall it as there is no uninstal option in Add remove programs in Windows 10 nor an Uninstall in the Strategyquant X diectory on c:\ Why is this. So I deleted the whole directory and used Regedit to delete all references to SQX. I then reinstalled it but after running a couple of tmes, I had same problem.
I tried the same again on my laptop but still same problem.
I finally got it working by dowloading the Zip fle and copying the contents into the c:\ directory.
Not sure what the difference is between the Zip and Install files but have you had any other comlaints about this?
You can try to delete file \internal\libs\Snippets.jar and then start SQX.
Did you try to reinstall it?