rvictl not working on big sur and ios 14 beta 3

I'm trying to inspect network traffic on an iphone 11 pro, I use:

rvictl -s [UDID]

on terminal and it closes after a couple seconds without any error. I know the UDID is correct because if I use a wrong one it brings up the help . I installed most of the extra tools I found for xcode and such and rvictl is available, it just doesnt work.
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Hi I meet same issue with getting the FAILED error. Updated to latest Xcode 12.3 (12C33) and macOS 11.1 (20C69) and iOS 14.3 (18C66):

sudo rvictl -s 00008101-<REDACTED>

Starting device 00008101-<REDACTED> [FAILED]

Same happens with and without sudo..
Does anyone get the solution?
Seems to work after running sudo launchctl load -w /Library/Apple/System/Library/LaunchDaemons/com.apple.rpmuxd.plist, although the response to this command was:

/Library/Apple/System/Library/LaunchDaemons/com.apple.rpmuxd.plist: service already loaded

The next time I ran rvictl -s UUID:

Starting device UUID [SUCCEEDED] with interface rvi0


I have tried all of the solutions in this thread, but I am still getting a failure when I try to start a device with rvictl on an M1 Mac mini running Big Sur 11.2.3 and Xcode 12.4. Any help would be appreciated!