We cannot provide support for Streamlabs OBS here. SLOBS is a derivative version of OBS, with the front-end UI hacksawed off and a shoddy webpage slapped over the gaping hole because Streamlabs has a lot of web developers and few actual competent coders.
I'd recommend trying it in OBS Studio, but I have heard of a few other people who have had issues with the OSSC and AverMedia capture devices... they may just not play well together. I believe that Voultar had problems with his. The first step is to try the capture combo in another piece of software, such as AM's RecCentral, the third-party AmaRecTV, or so on, and see if the freezing persists. If it does, the fix is to swap capture devices or contact AverMedia for further support with their hardware.
Additionally, PLEASE do not DM individual forum members with copy/pastes of your threads to try to force a response.