I guess i have to now joinEVERY SINGLE GROUP on here so i can see posts? It is getting about 50-50 , in terms of "post not available", even from people i follow . When i joined groups was totally optional, not a must-do.
I have the same problem, but to a lesser degree. About 1 in 20 posts are "not available". The error message doesn't give a reason, or even name the group. However, if I explore the link, I can discover the group. None of that helps me see the post, though.