Internal Server Error 400 / 403 (Clear your browser)

Suspect a few people aren’t sure the best way to do this so:

  1. Close Zwift completely, including the launcher from the system tray (right-click and Exit).
  2. Hit Start and type Internet Options and select it.
  3. Down the bottom under Browsing History hit Delete…
  4. Tick all the boxes except the first one and press Delete.
  5. OK out of Internet Options.
  6. Start Zwift and try again. You’ll need to log into the launcher again because you’ve now deleted your credentials.
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