I have a Grobo 1 and 2 and I see some topics with Grobo 2 problems and people should make sure to put in an “official support ticket”. OK to post here, but you need to contact support too.
Many of the problems, at least for me, they have fixed. You need to contact them and they can get yours going too.
A couple problems were “me” and my wifi not being good, also might have had the drain hose low in a bucket and possibly causing a vacuum or some kind of issue. I added a $20 wifi repeater, put the drain hose higher up and that helped.