White screen
Just one app is showing a white screen when opened. How to fix.
iPhone 12, iOS 16
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Hi, and welcome to the Apple (user-to-user) Community.
Re: "Just one app is showing a white screen when opened. How to fix".
If you haven't already, you might want to try updating to the newest iOS version:
Eg: About iOS 16 Updates - Apple Support says iOS 16.5 is the latest.
or
If you have already updated to iOS 16.5, restarting your iPhone may help:
How to: Restart your iPhone - Apple Support
If you still need help:
Apple support has an article online that may help troubleshoot:
What to do: If an app on your iPhone or iPad stops responding, closes unexpectedly or won’t open – Apple Support
Else: If needed:
You might want to reach out to the iPhone Support: Team:
(There's a "Get Support" link at the bottom of their webpage... link below)
iPhone - Official Apple Support
All the best :-)