Upgraded to Mac Catalina, now #include errors detected in VS Code

[JeffFink]

VS code was working fine, then I upgraded to Mac Catalina, and I now have this error

include errors detected. Please update your includePath. Squiggles are disabled for this translation unit

Also this error

cannot open source file "iostream" cannot open source file "iomanip" etc...

My c_cpp_properties.json is

{ "configurations": [ { "name": "Mac", "includePath": [ "${workspaceFolder}/**" ], "defines": [], "macFrameworkPath": [ "/System/Library/Frameworks", "/Library/Frameworks" ], "intelliSenseMode": "clang-x64" } ], "version": 4 }

and my settings.json is

{ "files.associations": { "iostream": "cpp", "iosfwd": "cpp" } }

I need this to work. Please help!