Got it to work. Thanks!
I pressed the Power Up button briefly and got one white LED on the RC, then quickly plugged the charger in before it went out and it seems to be charging up again.
I'll wait to see how it behaves when fully charged and if some other update is needed. It took me through a couple of "Failed Updates" and sending the data to DJI before it finally said everything is updated. I doubled checked it all after rebooting and nothing showed s being needed to update - just the RC is sort of wonky now with the charging.
On the main GO 4 screen where it says "Update required" in blue on the left upper part of the opening page, I found if I clicked the small "i" in the circle within it, it opens up another page that shows just what components it is updating along with their percentage done as well as the overall firmware percentage done (i.e. Two percentages shown.). This update did a lot to the Vision sensor camera, four IMUs, main camera, video processor, etc.
After this mess, I really wonder if anyone at DJI really checks these things with each update. Seems they always manage to mess up something else in the process. Surely they would have caught the charger error if it has happened to three of us here.