Hi, we had problems this weekend with google sharing, I posted a help request in google community forums (
https://support.google.com/docs/thread/8528484?hl=en)
Anyway please let me know if you have any specific access problems, in which I can add you manually!
bw
alex
ps. I have found out that you have to request edit rights from this group, to each sheet in the posts below // permission should be granted automatically