Check the Paramount Plus Server

Use a compatible browser like Google Chrome, Safari, Mozilla Firefox, or Microsoft Edge to make sure videos on Paramount Plus play smoothly. You won't be able to watch any movies on the streaming service if you use a different browser.
Also, make sure that your gadget has the latest supported version of the operating system (OS). For example, you might have trouble playing on-demand movies if you are using a version of Windows XP or Vista that is older than v68.




If you use a supported browser and keep your OS up to date, you can watch on Paramount Plus without any problems.








Check the Paramount Plus Server
If everything on your end seems fine, the problem is probably on Paramount's computer. You won't be able to watch any movies on the site if the server is too busy or being worked on.
You can't do much in this case other than wait for Paramount Plus to fix the problem. You can go to the Paramount Plus status page to see if any outages have been recorded, or you can follow them on social media sites like Twitter or Facebook to get the latest news.