I’m having an issue since last week with the bitwarden extension for Windows browsers. Tried in different browsers: firefox, Edge and Chrome but in all of them hace the same issue:
The error you are receiving is very generic. Could you open the extension in a separate window and open the browser console in order to see any log messages?
BTW: Using the screenshot tool provided by your operating system instead of taking an actual photo of the screen with a camera would improve the quality of your screenshots.
The error 502 Bad Gateway error indicates a network issue, probably involving a proxy or load balancer. There is not much that you (or Bitwarden) can do.