This is what I’m getting from a (previously well-running) Syncthing instance on my Ubuntu VPS. I thought it could be a folder-rights issue, but everything I’ve done has had no effect so far. Tried to uninstall/reinstall, to no avail.
Clear the browser cache and use a network debugging tool (e.g. developer tools in browser) to check if browser loads all assets like javascript-files, fonts, etc. You should also see a heartbeat (e.g. folder status update) every few seconds