Cannot Upgrade/Reenable EndPoint Manager after upgrade to 12.0.1rc32

I just upgraded to 12.0.1rc32 from 2.11 and I seem to have lost my EndPoint Manager.

In the Settings menu, EndPoint Manager is missing.

In Module Admin, for EndPoint Manager, it says my version is

If I choose “Upgrade to and Enable”, and then Process and then Confirm, it seems to hang at

"Please wait while module actions are performed

Installing endpoint"

It has remained there for about 10 minutes.

Am I not waiting long enough or is there something else afoot?