I got the same issue. My TT was updated before I tried to file an amended return - so definitely not an update issue. I reached out to TT support line three times last week, their suggestions were not consistent depends on who was taking the call - One person suggested me to wait for the opening for the efiling process; but another person told me that the efilling process had already open but it didn't work for 2022 amended return. She also suggested to file by mail which can be very frustrating. I wonder if TT tech support could take a notice of our post and frustrations and could fix the problem.
