If you guys don't mind, it will help us if you provide your system specifications - please click on the Apple menu in the upper left and select About This Mac, then provide us with the information on the Overview tab (or even better, upload a couple screenshots - you can press Cmd-Shift-4 to select an area for screenshot).
I just bought Mac 2020 version today 3/3/21 to run on my MacBook Pro 2020 which came with Big Sur. I do have the color problem, and blank notation page and blank lead sheet. Can't close lead sheet
Here's my Mac spec:
MacOS Big Sur 11.2.2
MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
1.4 GHz Quad-Core Intel Core i5
8 GB 2133 MHz LPDDR3
Intel Iris Plus Graphics 645 1536 MB
Thanks for looking into it.
Antoine