I would suggest doing a full reinstall. If there is a break in the programs processes then this should reset them.
What you will need to do is delete the app (uninstall) from Applications instead of just reinstalling over it. Then in Finder go to the top menu and then access Go > (holding one of shift/alt/control/command) Library > Application Support > Jaksta Media Recorder and delete that folder (NOTE: doing this will erase your library file list in Jaksta, but your downloaded/converted files will remain intact in their destination folders). Reboot the Mac and then do a reinstall of the latest version (https://www.jaksta.com/download/mac/jaksta-media-recorder) and it will generate a new copy of the deleted folder and the application files.
If the problem continues then it is likely due to a change to the streaming protocol on the site that is causing a download failure. If that were the case then we would need to build a fix for it, but I can give no estimates for that.
As an alternative you could try using Jaksta Screen Recorder which will allow you to actually record what appears on the screen - https://www.jaksta.com/products/mac/jaksta-screen-recorder
From Liam @ 17 Sep 2018 12:09