I get error message
'Value cannot be null. Parameter name: userContext'
in Visual Studio 2017 when trying to click notification or opening Extensions and updates from tools folder. Before answering can you look this Answer. The answer did not work on me.
I had a similar issue with Visual Studio 2022. I would perform Ctrl + F and it would simply give me a message box saying:
Value cannot be null. Parameter name: textView.
Simply closing and reopening Visual Studio worked to resolve this, if anyone is experiencing this issue.
