1👍
✅
error: Unable to find vcvarsall.bat
You do not have a valid Visual C++ Installation in your System. Visual C++ Express Edition is free and you can download and install it.
In Case, if Visual C++ is Installed but you are still facing the issue, check the following environment variables
VS100COMNTOOLS
VS110COMNTOOLS
To ascertain if they are set and locates to a valid Common7\Tools location
Source:stackexchange.com