Unexpected internal error message on opening Messenger

Hey there ellimacker,

Thanks for reaching out to the Apple Support Communities. To get started, if you've gone through all the steps in the following resource, the best option would be to reach out to the app developer for additional information or troubleshooting steps: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

1. Close and reopen the app

Force the app to close. Then open the app to see if it works as expected.

2. Restart your device

Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.

3. Check for updates

To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad.

4. Delete the app, then redownload it

Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed.

For help with reaching out to the app developer, check out this next link here: How to contact an app developer - Apple Support

Contact the developer of an iOS, iPadOS, or watchOS app

1. Open the App Store on your iPhone, iPad, or iPod touch.

2. Search for the app, then tap it. If you can't find it, tap the account button  or your photo at the top of the screen, tap Purchased, tap "Not on this [device]," then tap the app.

3. The app's product page appears. Scroll to the Ratings & Reviews section, then tap App Support. If you don't see App Support, make sure that you're signed in with the correct Apple ID.

We hope that's able to help.

Have a great day!