Guys, not quite out of the woods for some of us yet. We are using Maximizer 10.5 with Windows 10 - the error persisted after updating windows. This time, we had to remove updates KB5021087 and KB5021233 to get Maximizer working properly again.
Note that KB5019959 no longer shows up as an update that is removable, it may have been superseded by something in the two noted updates above.