Same issue 10.15.7 is broken
I have the same issue. My new mac book pro was working flawlessly until a minor update to 10.15.7 broke my two external monitors. The error was briefly on my screen and along the lines of: Displaylink kext is not compatible with this version and the developer will need to update their software.
I restored from time machine backups because I too am on a time crunch. Please investigate and update your software.
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