Disappeared Instagram direct messages.

Hello. It has been 2 days now since all my Instagram conversations disappeared suddenly. If I contact someone I have spoken to in the past, our previous conversation is no longer available either. I asked friends to send me messages to see what would happen, but the only thing I receive is a notification. However, when I click on that notification, I can never access the message in question. I have already tried 4 different logins, completed all updates, uninstalled and reinstalled the app to no avail. P.S.: I have another Instagram account on the same phone where the DMs work perfectly; it's only on my personal account.
Thank you for your help.