Preview not working in the desktop app

Using v3.2.1

I can preview the effect thru the QR code but nothing shows in my Preview window. Media or Camera. This is working yesterday.
Another problem is when I clicked the home button while in a project, after saving app closes and did not restart.

Got the same problem?
I am a newbie.

1 Like

Also app shutdowns when trying to submit a filter.

I solve it myself. I am using Avast ad my Wi-Fi was marked as public.
I changed it to private.