As of Beta 3 the Displaylink Manager app seems to work fine.

I had to backup my data, wipe my system, reinstall Catalina and 5.2.1. Then 10.15.6 came out and blocked 5.2.1. I posted my workaround for that here: https://www.displaylink.org/forum/sh...24&postcount=9

I'm holding fort with Catalina 10.15.6 until 5.2.4 or better stabilizes. I'm making the formal recommendation to my clients to hold at 10.15.5 and case test 10.15.6 with my workaround.