When I open WebStorm I got "The application “WebStorm” can’t be opened." and "255"

OS: MacOS Big Sur 11.2.3

That's what I see

 

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This error can occur for dozens of reasons (see http://www.cleanmacoserror.com/fix-mac-error-code-255/) - MacOS error messages are not too verbose. Did you try uninstalling the IDE and re-downloading it from scratch?

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