"Network not ready" - Can't send MMS

I can't send MMS with Google Messages nor Mi Messages.

Every time I attach a picture, I get a message that states "Network is not ready".

Chat Features are enabled, APN settings are correct per my carrier, mobile network settings were reset, switched SIM from slot 1 to 2, deleted all the existing APNs and re-added the correct one, I checked the permissions, etc.

I can send MMS on a S21 Ultra with the same APN settings. I used to be able to send MMS with my MI 10 Ultra as well.

I do see...

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