Ok so I fixed my own problem by going back to one of my old posts :).
If you are having this problem, please see my detailed instructions here:
Hi there. using Mac 11.1 with 6 desktops and 3 fullscreen tabs in TotalSpaces2 2.9.6. Love it. no big problems with it like those above, however I am having some strange behavior occur. Whenever I go to save something from another application into Finder, say a document in Microsoft Word or a pdf downloaded from Chrome, the display goes crazy. It goes back and forth rapidly between the desktop I’m on and main desktop 1, and I get caught/frozen in the transition between display windows and/or most of the screen is black except the space where finder popup should be (the popup is opaque). I think what is happening is TotalSpaces thinks it needs to change displays when it really doesn’t. The only way I have found for getting out of it is switching back to my main display 1 via keyboard shortcut. Attempting other nearby TotalSpaces-made desktops does the transition, but that desktop is also frozen. Thankfully I can still save files using my Touchbar, but I can’t choose where they go anymore. Thanks in advance for help.
It sounds like there is some confusion about which space should be active - I’ve seen this kind of thing happen occasionally when there are multiple windows of the same app on different spaces, particularly large slower apps like Word. I think it’s a timing issue, and I’m sorry to hear about it. I don’t think we know how to solve it, other than it might help to check your app assignments (assigned apps that are assigned to a particular desktop might cause problems if they have windows that have been moved to other desktops).
Thanks for your help. Turns out removing word and chrome from the assigned app list seems to work.
Hi Stephen ,
New problem appear on Big Sur bêta 11.3 (20E5172i) with TotalSpaces V2.9.6.
It’s impossible to move between different spaces , if i click on directly on the grid ,i stay on the same space where the app as started. Same trouble with shortcut’s not possible to select other space.
i love this app
Thank you, Stephen
Hi,
I have a potential fix: please try the latest https://downloads.binaryage.com/TotalSpaces2-2.9.7.dmg
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Seems to be working fine for me now on the latest Big Sur beta. 
Thanks!
Works great on macOS Big Sur beta 2.
THANK YOU Stephen
When invoking the overview grid, window transparency effects are removed. Will there ever be a fix for this?
Hi, after trying the 2.9.7 , my problem appear not resolved , impossible to change between my differents desktops created on the grid…
In preferences/layout , impossible to erased the raws , only the columns are possible to modify.
bye
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I’m having similar problems. TF2 will also freeze up and not let me quit. It doesn’t even show up in the Force Quit listing. I hope there’s a fix soon.
Under macOS bêta 11.3 (20E5186d) ,TotalSpaces 2.9.7 run perfectly ; thank you Stephen
Mmm, The same problems reappear with Big Sur bêta 11.3 (20E5196f)… unfortunately … 
I confirm, TS2 has broken on beta 3 of 11.3 (20E5196f)
Stephen, I just want to encourage you. This is a great product. I am running BS 11.2.3 (I like the BS!), and am wondering about TS2 2.9.7. Will it work? Can anybody give me some feedback on that? Thanks.
Please try version https://downloads.binaryage.com/TotalSpaces2-2.9.8.dmg
I made some fixes for 11.3 beta 3.
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Thank you Stephen, it works, nice relief to be back on TS2 within Big Sur 11.3 beta 3 ! Best, C
Me too , work well here… thanks Steph.
Apple used to have this App installed years ago and then abandoned it for the silly windows at the top of the screen. It was actually an AppleCare rep who referred me to TotalSpaces.
How do I install this version? Do I need to purchase a new key with a serial number?
I cannot get Total Spaces to work with Big Sur OS 11.2.3