When you install Configs that are for Series X|S via the Beta, that means that you need to use the Beta (since the store version of Manager doesn't understand it). Unfortunately, the only option would be to Factory Reset your XIM and go back to using the store version. Sorry about that, to this day I have no idea why Apple expires TestFlights and worse stops you from using it. It's going to take more than a week for us to get another build through Apples submission process.
If you have a PC, you can use the Beta Manager there. It will required wired configuration, but, it'll get you by until we can get another TestFlight through.
So first off, Thank you so much (the admin was awesome with the extra info. OBsIV you are the man!) . I was fearing I was going to lose all my sens and everything. So I took my girls PC since I could not use my Mac and downloaded this (from the XIM site
http://cloud.xim.tech/Beta/XIMAPEXManager-20210625-PC.exe ) I then set the load buttons on my mouse scroll up for COD, scroll Down for Rainbow Six. So as long as i'm not scrolling my wheel or bashing my mouse I do not have to keep plugging my XIM into a PC to switch my config. I am very happy with all my sensitivities so no need to keep messing with them currently. (I set the switch config button as scroll up and down because I do not play on keyboard. I play on a NAV controller and i do not use the wheel for anything else)