Hi! You may try to install .NET Framework 4.8 in the same bottle that you are trying to install MusicBee. It is available when you search for it in the Crossover's searchbox.
Good luck!
Please Note: This Forum is for non-application specific questions relating to installation/configuration of CrossOver. All application-specific posts to this Forum will be moved to their appropriate Compatibility Center Forum.
CrossOver Forums: the place to discuss running Windows applications on Mac and Linux
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