I got the “This website declined to show this webpage” error for the first time yesterday. I got a pretty quick respone from a zwift ambassador with a workaround that seemed to have worked… I tried all the clearing cache and reinstalling then also tried connecting via my phones 4G hotspot instead of the PCs wifi and zwift loaded and let me login again. I switched back to the wifi and all seems ok for now…
I am getting the same error. 403, 400, and 500 errors. Once, last night, I kept refreshing and was able to log in and go for a ride. Once I left, same problem. So the issue seems to be server side.
Same here with my MacBook pro, clean up all cookies, restarted and I was able too see at least the zwift window, but I can get in, again “forbidden”, “bad request” or “internal server error”
Still no resolution or update from Zwift’s elevated technical support. Zwift did run for me this morning even though I didn’t change anything. It briefly showed the “Forbidden” window, then went to the logon screen and ultimately loaded. The “Forbidden” window still leads me to believe that something isn’t right. I also suspect it is on the server end and not my setup since I haven’t changed anything and, other than a slightly higher ping rate, everything appears to be fine. Will continue to troubleshoot on my own until I hear back from Zwift Support.
This error (HTTP 400 Bad Request) means that this program was able to connect to the web server, but the webpage could not be found because of a problem with the address.
Why these browsers and not Chrome / Firefox / Edge / or whatever your preferred browser happens to be? Because the Zwift launcher app that logs you in piggybacks onto the default browser that comes as part of your OS.