A new save, a new household, same issue.
My teen Sim had a friendly hangout (Lovestruck event) at a national park lot (I replaced the default park with a new lot) near the pier. Couldn't ride any rides with my Sim and his friends. I added one of his friends to my household but wasn't able to ride until I canceled the event. Once the friendly hangout was canceled, I was able to ride with his friend as long as they were in my household.
Days later, my Sim went to prom and was invited to the pier afterwards. I went with friends and was able to ride the rides and take photos in the booth WITHOUT having to add them to my household.
No issues riding any rides at the pier if I was invited to the pier after prom, but if I try to visit the pier normally, I am unable to ride any rides or take any photos in the photo booth if the Sim is not in my household and no event is taking place.
I have the exact same problem. My teenage Sim can't use any of the rides on pier with another sim. I tried to move the photobooth and one of the roller coasters with the T.O.O.L. mod (like someone suggested in the old bug report topic), but my sim still says every time that something is blocking the path.
