Logic Pro X: No output (MIDI or Audio)

Neither as instrument or MIDI FX - it can receive midi, but it doesnt send anything out, no audio or midi at all.
I downloaded it to try the demo, i still get the white noise but nothing more than that - in both plugins.

The sample directory is where it should be, freshly installed just doesnt work, highly disappointing.

Mojave 10.14.6
Logic 10.4.8

Hi @HermanFuling

have you tried rebooting after install, it sometimes helps get rid of this issue.

Otherwise, check for anything that can impact midi routing, specific hardware, audio interface or settings in your session.