Hi,
just got out of Apple Store tech appointment and they fixed it.
1-sign out of your iCloud account.
2-goto “messages” in settings and in “imessage app”. Then turn off all apps. 3-Back to “Messages” settings, turn “iMessages”off
4-goto “General” in settings and scroll down to “Transfer or reset iPhone”, press “reset” then “reset network settings”. This will delete all your WiFi passwords saved. iPhone will reboot. Once it boots back up. Goto “iMessage” and check to see if stickers drawer will open. It worked for me!
5-sign back in you iCloud in settings
6-goto your iCloud profile, then “iCloud”, click on “show all”. Turn “messages” ON. This will synced back all your iMessage contact info.
you will have to add back your wallet info.
Hope this helps ya’ll out!