Take a look in the folder where LINQPad looks for .snippet files. By default, this is My Documents\LINQPad Snippets, unless modified in Edit | Preferences > Folders. Are there any unusual subfolders or files in there?
Also check the Visual Studio snippets folders for anything unusual (LINQPad looks in these, too):
My Documents\Visual Studio 2019\Code Snippets\
My Documents\Visual Studio 2017\Code Snippets\
My Documents\Visual Studio 2015\Code Snippets\
My Documents\Visual Studio 2012\Code Snippets\
Comments
Sorry about the ridiculously small image...
Have you submitted the error? Can you click on "View More Details"?
Take a look in the folder where LINQPad looks for .snippet files. By default, this is My Documents\LINQPad Snippets, unless modified in Edit | Preferences > Folders. Are there any unusual subfolders or files in there?
Also check the Visual Studio snippets folders for anything unusual (LINQPad looks in these, too):
My Documents\Visual Studio 2019\Code Snippets\
My Documents\Visual Studio 2017\Code Snippets\
My Documents\Visual Studio 2015\Code Snippets\
My Documents\Visual Studio 2012\Code Snippets\