Two weeks ago, I was able to use the stream downloader to get content from Paramount+. Now it throws a "URL is not supported" error when I attempt to use the feature. Not sure if the service added a layer of DRM that prevents Jaksta from grabbing info from the site, but this now seems to be the case. This should probably get looked into and see if it's possible to fix.
You will need to use the DVR recording features of JMR to capture this site at the moment.