Can't open Mail People and Calendar apps

This is posted in the Windows 8 section and the screen cap doesn't look like the same issue on Windows 10 (broken app names are completely different).
 
This is posted in the Windows 8 section and the screen cap doesn't look like the same issue on Windows 10 (broken app names are completely different).

Yes this is windows 8. I fixed it by restoring software because uninstalling didn't helped.
 

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