I have a pretty strange issue that I’m not sure what would be causing it. I am hosting Vaultwarden in a docker droplet on Digital Ocean and proxying it using Caddy and it works perfectly fine, apart from on Wifi on my mobile devices (iPhone and iPad). It comes up with "Cannot open the page because it could not connect to the server’.
It works absolutely fine via the same wifi on my laptop and desktop but not on mobiles devices. If I use mobile data rather than wifi however, then the mobile devices connect just fine! I’m not sure what information might be needed in order to trouble shoot, so just let me know that you need!