sidechain in cubase 9.0.30 does not work

Hi all!
ive got a **problem** with **sidecain** in my **C 9.0.30** (everything was ok in C 8.5). i activate the sidechain knob on the strip compressor, but theres nothing to select in the send on the other track. i tried to do it with an insert compressor, but the plugin has been deactivated and does not respond :frowning:
does anybody know, how to fix this problem? THANKS!
P. S. the system is: Mac Pro with El Capitan

Hi and welcome,

Is it always reproducible on your system? In any project?