Hi Megan Winder 

Unfortunately you have not explained what you are/were doing when this error message was thrown, therefore I am going to assume this is to do with the 'fuzzy bands'...

In the following Gateway article the issue is explained and the two resolutions offered-

https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0028537

Please let me know which one worked for you.

Hi Megan Winder 

Are you saying you are not even able to open Studio?

If this is the case- try resetting Studio 

https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0033669

then follow the previous instructions with the package.

I have the same issue when launching Studio. It often gives me the error message, but trying again soon afterwards usually results in Studio opening smoothly. Similarly, Studio often fails to open in a full window and remains minimised in the Windows taskbar (which only has to be clicked). It seems to me that the Studio startup routine has been a little flaky for several months. I recently bought a new PC and even with a new installation, the same thing is still happening.
I should perhaps point out that while the installation is pretty new, I have changed several options to set up Studio the way I want it again. It seems to me that while a reset might help by restoring everything to default status, the real task (assuming that restoring the defaults remedies the problem) is to discover which non-default setting is causing a problem and find a way to resolve the problem - otherwise there is a very good chance that the same issues will reoccur as soon as the user selects the same options.
TBH, I don't think that suggesting that a program's defaults are restored is really very helpful - it falls into a similar category as "try reinstalling the software" - everyone knows that the possibility exists and might resolve the issue, but wants to avoid that approach as it involves a fair amount of time and if the cause of the issue hasn't been found...

I had the same problem yesterday (community.sdl.com/.../54567. Resetting solved the problem until I quit and restarted Trados Studio. I had to reset the program every time, losing all preferences in the process. I agree, this solution is not really helpful in the long run.

Today, however, startup was flawless and even quitting and restarting was not a problem, the error is gone (fingers crossed). I did not reinstall any plugins yet, though.

Edit: After lunch, the error was back. I had to reset yet again. Still no solution.