FWIW, I just got this error message for the first time.
I had just created a new Special Item topic and saved it, creating links as part of saving it.
Next, I deleted the picture (simple) snippet, which was one of the default snippets for that topic type. When I tried to save it again, it gave an error message, which I failed to screen capture.
I clicked the Send Error Report and it go through most of it but right before the final green check, if gave the Error 2002 dialog box, the screen capture of which I provided at the top of this post.
I clicked the "Retry" button but got the same error and then clicked the "Cancel" button.
I restarted and re-logged into Realmworks and immediately received an error (likely because it was opening the problematic topic automatically. This time I took a screen capture. Here it is:
This time I saved the error report as a file rather than attempt to send via the "Send Error Report" button.
I tried a third time, this time selecting the "work offline" option, rather than logging in, but still got the same error.
Ah well, here I was feeling fortunate that I was not experiencing any issues with the upgrades...not I can't even use the program.
Yes, I'll be submitting a bug report with the exception report file and everything I put in this post, but I though that it might be helpful to other users who may be trying to determine if their issues are the same.