I just updated my Syncthing instance when prompted. The new package installed and I was able to login, but once I login the page becomes stuck in a refresh cycle, probably ever 2 seconds with no details. I can’t do anything. Tried a reinstall from the Website and same problem. Was there something I missed? Previous version with this same OS Version was fine.
OS: Synology 7.2.1-69057 Update 1
This appears to be an artifact of Syncthing v1.26.0 enhancement Use a real login screen + sessions instead of HTTP basic auth · Issue #4137 · syncthing/syncthing · GitHub
Clearing cookies for the URL appears to correct the “infinite refresh” behavior.
Thanks both Tomaz and Mopani. Tested with Safari, no issues. Things resumed to normal in Firefox (macOS, Ver 119.0 if anyone is wondering) when I cleared out those Cookies.