I think something has been messed with your system settings. In a normal Windows install, the folder %USERPROFILE%\AppData\Local\Microsoft\WindowsApps should always automatically be on the PATH, but it looks like that is not the case on your system. That is the root problem here, if that folder is not on the PATH things won’t work. Easiest fix is probably to just add that to your Path variable in the User variables part of the environmental variables UI.
You should not add the folder that you found in the filesystem to the PATH, that won’t work, nor should you add any other folder manually.