Open your Mobile “Settings” and choose “General Management” from the available options. Download and set up the app once more and try to add members now. Tap on the “Groups you have left” option and choose the group you want to rejoin. Now, tap on the three-dotted menu to get varied options. First of all, launch the GroupMe app and open the “Group” you want to add your friend to. This ought to repair the “didn’t add members issue” on GroupMe, if not, then proceed to the 
following technique.
You also can manually invite pals from your address e-book to join the service. GroupMe asks on your cellphone number so it may possibly verify your identification and allow you to discover different friends who use the app. Using your cellphone quantity, GroupMe also can send you SMS messages from your teams should you don’t need to, or cannot use the app.