RE: Mobile application error ''App doesn't exist'' when entering Work Order hours.
I'm sorry to hear that you're experiencing issues with the mobile application. Without more information, it's difficult to determine the root cause of the issue, but here are some potential troubleshooting steps you can try:
1. Check for any recent updates or changes that may have caused the issue. This could include updates to the mobile application or changes to the work order entity in Dynamics 365.
2. Review the error message and code in more detail to see if there are any clues to the underlying issue. You may need to consult with a Dynamics 365 expert or developer to help you interpret the error message.
3. Try clearing the cache and data for the mobile application on the user's device. This can help to resolve any caching or memory issues that may be causing the application to malfunction.
4. If possible, try replicating the issue on a different device or with a different user account to see if the issue is isolated to a specific device or user.
5. Consider engaging with Microsoft support to help diagnose and resolve the issue. Microsoft support can provide more in-depth troubleshooting and diagnostic tools to help identify and resolve the issue.