Error on editing folder scan interval

[bigbear2nd (Bob Hope)]

It could also be this:

Error when trying to delete or add device

Did you open 2 GUIs of 2 syncthings in one browser at the same time? I remember seeing something like this on the issue server once…

Error when trying to delete or add device

The Syncthing GUI uses cookies to maintain a session. You can’t have more than one session open against the same website in the same browser, much like you can’t log in as two different users on this forum at the same time from the same browser, so that may cause this issue.