Hello Jon The Nerd,
This is indeed weird. We have not seen this problem before.
Could you please elaborate a bit more on the steps you performed before the error appeared. Screenshots and any other related info will be of great help to us. What is the OS that the machine is running? If it is acceptable for you, you could send a sample project, where the issue is isolated. We will test your app locally and try to locate the problem. You can attach the files to a new support thread.
Thanks for your time and cooperation.
the Telerik team
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