As a follow up, performed a maintenance this morning on the outstanding sites in our environment. All were successful using the 2.3.0p15.cme release.
Each complained at the same point in my earlier testing with a workaround but I was able to continue and disable the older plugin and it later enabled the already uploaded updated version of the plugin.
Thank you for the timely attention and fix(es).
Sincerely,
Scotsie