RESOLVED: 6.12.0.3239 can't set up PMS on Shield - hangs on "PMS is starting for the first time ..."

I’ve had to reset PMS on my Nvidia Shield for an unrelated reason.

The latest Plex client won’t complete setup with PMS - it hangs on the “Plex Media Server is starting for the first time, please wait …” message.

This happens even if I delete data, and remove all updates back to the stock distributed PMS.

Plex is now totally dead for me on the Shield since this update.

@jesusmc any suggestions?

Scratch that … user error!