Using Chrome 76.0.3809.100 I sign in, I select the game, I click Launch Game, the world ends. This request is throwing a 500 error. I've copied it here in fetch and curl formats: fetch("<a href="https://app.roll20.net/editor/" rel="nofollow">https://app.roll20.net/editor/</a>", {"credentials":"include","headers":{"accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3","accept-language":"en-US,en;q=0.9","sec-fetch-mode":"navigate","sec-fetch-site":"same-origin","sec-fetch-user":"?1","upgrade-insecure-requests":"1"},"referrer":"<a href="https://app.roll20.net/campaigns/details/4884206/ronans-game","referrerPolicy":"no-referrer-when-downgrade","body":null,"method":"GET","mode":"cors" rel="nofollow">https://app.roll20.net/campaigns/details/4884206/ronans-game","referrerPolicy":"no-referrer-when-downgrade","body":null,"method":"GET","mode":"cors</a>"}); curl '<a href="https://app.roll20.net/editor/" rel="nofollow">https://app.roll20.net/editor/</a>' -H 'authority: app.roll20.net' -H 'upgrade-insecure-requests: 1' -H 'dnt: 1' -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36' -H 'sec-fetch-mode: navigate' -H 'sec-fetch-user: ?1' -H 'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3' -H 'sec-fetch-site: same-origin' -H 'referer: <a href="https://app.roll20.net/campaigns/details/4884206/ronans-game" rel="nofollow">https://app.roll20.net/campaigns/details/4884206/ronans-game</a>' -H 'accept-encoding: gzip, deflate, br' -H 'accept-language: en-US,en;q=0.9' -H 'cookie: __cfduid=db738692c3ae6f25fe5e366f0b7f43c481564400754; rack.session=2d944bb427cba9cc316d34cfcf843b2516b9b43e2a95a7843aa9c9445bd4a422; roll20tempauth=70' --compressed Response: Request URL: <a href="https://app.roll20.net/editor/" rel="nofollow">https://app.roll20.net/editor/</a> Request Method: GET Status Code: 500 Remote Address: 104.20.241.7:443 Referrer Policy: no-referrer-when-downgrade Response Headers cache-control: no-store, private cf-ray: 508c75f82abf9ae8-DFW content-encoding: gzip content-security-policy: script-src 'self' 'unsafe-eval' https://*.googlesyndication.com https://*.doubleclick.net <a href="https://partner.googleadservices.com" rel="nofollow">https://partner.googleadservices.com</a> <a href="https://www.googletagservices.com" rel="nofollow">https://www.googletagservices.com</a> <a href="https://ssl.google-analytics.com" rel="nofollow">https://ssl.google-analytics.com</a> <a href="https://www.google-analytics.com" rel="nofollow">https://www.google-analytics.com</a> <a href="https://ajax.googleapis.com" rel="nofollow">https://ajax.googleapis.com</a> <a href="http://ajax.googleapis.com" rel="nofollow">http://ajax.googleapis.com</a> <a href="https://d3clqjduf2gvxg.cloudfront.net" rel="nofollow">https://d3clqjduf2gvxg.cloudfront.net</a> <a href="https://cdn.firebase.com" rel="nofollow">https://cdn.firebase.com</a> https://*.firebaseio.com https://*.tokbox.com https://*.opentok.com <a href="http://static.opentok.com" rel="nofollow">http://static.opentok.com</a> <a href="http://www.google-analytics.com" rel="nofollow">http://www.google-analytics.com</a> <a href="http://cdn.crowdin.com" rel="nofollow">http://cdn.crowdin.com</a> <a href="https://crowdin.com" rel="nofollow">https://crowdin.com</a> <a href="http://stun.l.google.com" rel="nofollow">http://stun.l.google.com</a> content-type: text/html;charset=utf-8 date: Mon, 19 Aug 2019 13:26:43 GMT expect-ct: max-age=604800, report-uri="<a href="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" rel="nofollow">https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct</a>" server: cloudflare set-cookie: rack.session=2d944bb427cba9cc316d34cfcf843b2516b9b43e2a95a7843aa9c9445bd4a422; domain=.roll20.net; path=/; expires=Tue, 03 Sep 2019 13:26:43 -0000; secure; HttpOnly status: 500 vary: Accept-Encoding x-content-type-options: nosniff x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block