TotalSpaces 2.9.9 Has 16 desktops and will not allow changes in MacOS 10.13.6

I have been unable to get TotalSpaces 2.9.9 to function in High Sierra. It reports 16 desktops but will not allow any change. I can get to go to a single column of three (only that no other configuration) but when I attempt to change it it still reports 16 as being the max and doesn’t allow the change.

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I am having the same issue in Big Sur.

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I also have this problem in Big Sur - when I try to increase the number of desktops beyond 9, it comes up with an error message saying the max is 16.

See for a work around.