Onedrive shuts down after about 5 seconds when opened on an iphone.

Delete OneDrive completely, force-restart the iPhone 13, and then reinstall OneDrive—the official Microsoft procedure for an iOS app that closes or crashes shortly after launch.^1^

Reinstall OneDrive cleanly

1. Delete the app rather than offloading it
   • Press and hold the OneDrive icon.
   • Select Remove App → Delete App → Delete.
   • Deleting may remove downloaded/offline copies and local app settings. Files already stored in OneDrive remain in the cloud.
2. Force-restart the iPhone 13
   • Press and quickly release Volume Up.
   • Press and quickly release Volume Down.
   • Hold the Side button until the Apple logo appears, then release it.
3. Reinstall OneDrive
   • Open the App Store, search for Microsoft OneDrive, and install it again.
   • Sign in with the same Microsoft account.
   • Confirm that the app remains open and displays the Home or Files screen.
4. Enable background operation
   • Open Settings → General → Background App Refresh.
   • Ensure Background App Refresh is enabled and the switch for OneDrive is on. Microsoft includes this in its iOS crash procedure.^1^

If it still closes

• If the iPhone is running a beta version of iOS, update to the latest stable public iOS release before testing again; compatibility problems are expected with prerelease operating systems.^2^
• For a personal OneDrive account, use Contact Microsoft Support from the support page below and report:
  • iPhone 13 model
  • iOS version
  • OneDrive app version
  • that the app closes approximately five seconds after launch
  • whether the clean reinstall changed the behavior
• For a work or school account, contact the organization’s IT administrator or service desk.^1^

References

1. Troubleshoot OneDrive for iOS app problems | Microsoft Support
2. Office Applications not working in IOS 26 Beta Public - Microsoft Q&A