I'm having wierd problem with Visual Studio for Mac community version 7.4.2.(build 12).
Every files I try to open I get error message and the files couldn't be open.
The error message is
=============================================
The file 'some file.cs' could not be opened.
Value cannot be null.
Parameter name: theFont
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It happened just this morning. It was just fine last night.
I cannot open any files in any solution.
When I open the files in the other text editor, it looks fine.
I googled it but couldn't find a solution.
If you have any idea please give me a comment.
I'm now updating my VisualStudio for mac application to alpha version hoping it fixes the problem.
I had the same problem. What I did was go to preferences in Visual Studio and changed the font to a different font. It worked after that. You mileage may vary though.