Hi There,
The link works but you need to open it in a new tab.
That means the Revolution Slider folder is there but it was incomplete, maybe something went wrong on your Revolution Slider updating process and some of the files has been corrupted.
To remove the incomplete Revolution Slider, please login to your server via FTP or cPanel and navigate to /wp-content/plugins/ and delete the revslider folder. Then back to your site admin dashboard re-install a fresh copy of Revolution Slider by navigating to X > Validation > Extensions and install the Slider Revolution
Remember to clear all caches (plugin, server-side, CDN, and browser’s cache) after updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
Cheers!