Apologies for the delayed response.
My first suggestion would be to install and try our latest beta and see if that helps. You can download the installer here: https://download.shedworx.com/jaksta/beta/3.0.0_315/JakstaMediaRecorder.pkg
When you first attempt to run the installer you will receive a Mac OS notification saying that it can't be opened because it cannot be checked for malicious software. Click 'OK' and then go to System Preferences > Security & Privacy > General and click on 'Open Anyway' down the bottom. It will either run the installer or another similar notification as the first will appear and you just need to click 'Open' and then the installer will run.
Please let me know if the problem continues.
macOS Big Sur 11.6
Recently the only browser that Jaksta will record video from is Chrome. Does not work with Safari, Ms Edge, Firefox, or Brave.
Some website streams are saved as .pts and Jaksta cannot convert.