This seems to happen Off and On with Textra.

I'm with AT&T Wireless and I live in Southern California. Yes, I've read the Knowledge Base articles - all the settings are correct on my phone.

I get this error message with incoming and outgoing pics sent via MMS. If I switch to the stock app that comes with Android Marshmallow no problems.

The problem seems to go away and come back AGAIN after Textra updates.

Are other seeing this? Textra aware? Care?

I really like this app but would love it if Textra would clean up the code for MMS and keep it stable.