Can't group Text

So, normally I can group text and individually text from my MacBook Air perfectly fine. I just got added to a new group text through and for some reason I can receive messages on it, but I can't text. There is no box at the bottom for me to type anything. All my other group texts work fine. I uploaded a screenshot of the way this thread looks. I'm thinking it might be because there is an android user in the thread, but I'm not sure if there even is one, as I don't know everyone in the group. What do I do?