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This happens when executing jack PortAudio with admin privileges, when launching Jack Control:
09:46:23.599 Patchbay deactivated.
09:46:23.600 Statistics reset.
09:46:28.893 JACK is starting...
09:46:28.894 jackd -dportaudio -d"ASIO::ASIO4ALL v2" -r48000 -p1024
09:46:28.918 JACK was started with PID=54661600.
09:46:28.928 JACK has crashed.
09:46:31.134 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info.