I had problems too. It seems as everything is working fine now. Maybe restart you device.
You restarted it and it's working fine??? Please make sure you have a backup!
Thanks for that advice!
To be honest, I was stupid. I forgot to restart my device and now everything works. Thanks

Restarting didn't work for me.
I ended up uninstalling and reinstalling the android app on an android phone, and then entering in the seed phrase to transfer the funds from the iOS wallet to the android. Then I moved the funds to a more reliable wallet for now.
Now I'll wait until they have updated the iOS app to decide what I want to do.
That's ridiculous. For me, everything works fine now. Is there an option to delete the MyCelium cache?