I am facing this issue in Visual Studio Code. I have already tried reinstalling the phpcs extension but still facing this issue.
Unable to locat
You stated that you already uninstalled it, so i'm assuming your trying to get rid of the extension and error.
How to fix:
From the VS Code Docs:
Q: Where are extensions installed?
A: Depending on your platform, the global location is in the following folders:
Windows %USERPROFILE%\.vscode\extensions
Mac ~/.vscode/extensions
Linux ~/.vscode/extensions