Website become extremely slow after logging in.

I'm having an issue on my computer where the entire website become incredibly slow after logging in. It won't even open an of the games I am in, it just fails half way and stops after seemingly loading all the text for the game and nothing else. Just a white page that looks like the one above. This is happening both Chrome and Firefox. Both are fully up to date and don't have any extensions. It doesn't even work in private or incognito windows. Website loads really fast if I'm not logged in though.

After letting the site fully load after posting this, in the "Play" drop down on the top of the screen, when I hover over it all the games I own don't load in. But the games I'm in but don't own load in just fine. My games just say "user_campaign" without any images.

After 2 days of this, I make a post and 30 minutes later it works fine. Thanks if anyone did anything, if not then it was all weird nonsense.

Those look like DNS lookup errors.  For whatever reason the DNS server you're using wasn't able to resolve the IP address when looking up cdn.roll20.net.  If you switch DNS servers if you encounter the errors again it might help.  No idea whose DNS servers you're using, but most likely it's your ISPs.  You could try using google's 8.8.8.8 or cloudflare's 1.1.1.1.  If you're more concerned about privacy you could also use Adguard's DNS servers but may run into sites complaining you have an adblocker on (whole other can of worms).  You can google documentation on how to do that for whatever OS you're using and why you would want to change from your ISP's DNS servers.