Like a lot of you, we'd done the 10/14
migration a while ago but still were locked out of eRx as of 10/14

I chatted with AC today (was 44th in line initially) and this is what fixed it for us:

-EVERYONE has to log out of AC
-log in to AC on the server and go to Admin options--Tools and about click on 3rd item from the bottom "Lexi data to First Data conversion.
It will bring up a med migration box with about 600 meds (for me) still pending migration. You can close this box out, say okay to the warning.
Then restart AC and it eRx shd be working again.