Error when adding new Entity Framework Core connection
When I try to add a new connection using the EF Core driver I get an error after clicking "Next>". I also tried to use the "Create similar connection option" of an existing connection and also get the same error. This makes the app pretty hard to use 
Comments
Try the latest beta and let me know if it helps:
https://www.linqpad.net/linqpad6.aspx#beta
The latest beta worked. I also tried to uninstall/reinstall the version 6.13.13 and that didn't fix the issue. Is there some kind of local app data folder I need to delete as part of the uninstall process to clear everything out?
Re-installing won't make any difference - you're just replacing files with identical files.
The local app folders are %appdata%\LINQPad and %localappdata%\LINQPad.