Nope. I have tried everything. Before, I was told that I will be able to do it after AOR. I couldn't. Then I heard people say that I will be able to do it after sponsorship approval. I still can't. I have linked it to my GC account, though.
I know of another person who had the same issue as me. They were also not able to register on the tracker (even after sponsorship approval) despite having linked their spousal sponsorship application to their GC account. However, about a week after sponsorship approval, they tried again and they were able to register on the tracker. There is nothing we can do except to keep trying.
Truth be told, I am not that excited about creating a tracker account. It seems that lately, the tracker info is also out of date. It is just like the GC account. I have seen people posting on different threads that even after they received PPR, the tracker was still showing very old info about things being in progress or documents not received. I am just happy that my application was not returned. I just need to wait now.