FormatAllFilesCommand is not executable ArgumentException

[nnpcYvIVl]

I get the following error when I right click on a solution and select format all files.

FormatAllFilesCommand is not executable

System.ArgumentException: Illegal characters in path..

[AdamDotNet]

I've also seen this popup when select format all documents on Solution.
VS 15.8.4 on Windows 10.

Microsoft Visual Studio
FormatAllFilesCommand is not executable.

System.ArgumentNullException: Value cannot be null.
Parameter name: source.

[alex529]

I've also seen this popup when select format all documents on Solution.
VS 15.8.4 on Windows 10.

Microsoft Visual Studio
FormatAllFilesCommand is not executable.

System.ArgumentNullException: Value cannot be null.
Parameter name: source.

i saw the same issue on VS 16.1.6, but only if i do it at the solution level, if i do it at the project level things work ok

[keineahnung2345]

On VS 16.11.5, I can format all files excluding "Solution Items".