Welcome to Microsoft Community and we are happy to help you.
As per the issue, you are unable to access ‘Wikipedia app’ from the starts screen as it does not open and comes back to the start screen.
I would like to gather certain information on this issue:
1) Is this issue specific to Wikipedia app?
2) Do you get any error message when you try to open the app?
If this issue is specific to Wikipedia app only, let’s try to check if Windows 8 App troubleshooter helps to resolve this issue.
You may follow the steps:
Perform App troubleshooter and check if that helps.
Note: App troubleshooter helps to fix issue that prevents and app to run on Windows 8.
I would request you please refer to the follow the link below to resolve the issue through App Troubleshooter:
While downloading the file, I would suggest you to save the file and then run it.
I would suggest you to refer to the link to below which states “What to do if you have problems with an app”:
Hope it helps.
Please write us if the issue still occurs. Else, you can contact us if you have any other Windows related issue.
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