How to solve this? Please, help. (Version 2012)
The 2012 version of Messenger pushes you to the web to accept invitations, which no longer works.
Right now the only way I know of is to download Butterfly Messenger, sign in with your Messenger credentials and accept the invitations there. Once you see they’re on your contact list, you can switch back to 2012.
Okay! Thank you, dear! <3