same problem since 7 days on all my 10 accounts, before i got over 40 dm per account and now 2-3.
This isnt the main problem, since 7 days now other users cant dm me, they get no error message i just dont see the messages.Insta recently changed their algo to essentially add being ghosted via DMs. If you send too many, or if they look spammy/against ToS, they'll ghost you from sending DMs for a little. Once you're un-ghosted, try spacing them out, changing some of your words around, and in general chill out with sending too many DMs. Just gotta be smart and adjust and adapt.