In GroupMe, this behavior matches the known add-member issue where Failed to add member, not allowed, Something went wrong, or no action can occur when trying to add someone.
Since direct add, QR code, and share link have already been tried, the supported next step is to use the group’s share link again as the fallback join method if needed, and then contact support or post in the GroupMe community for further help.
If adding members from the app or web is still needed, the standard paths are:
- Android: Group chat > group avatar > Members > Add members > search by name, email, or phone number > select the person > Done
- iOS: Group chat > group avatar > Members > Add members > search by name, email, or phone number > select the person > Done
- Web: Group chat > group avatar > Members > Add Members > search by name, email, or phone number > select the person > Add member
- Windows: Group chat > group avatar > Members > Add members > search by name, email, or phone number > select the person > checkmark
For this case, the documented escalation path is: