Intermittent "None of the configured SessionInitiators handled the request"

[Cantor, Scott]

You'd need logs, and they should already be there, they just aren't looking at them.

As for the cause, it's probably metadata expiring or something odd like that, perhaps restarting it is refreshing the metadata somehow.

You also don't need overrides to do this, the IdP can be overridden by path directly. But that's not the underlying issue, it can't handle the request because it can't issue a request to the IdP and that's not going to go away without knowing why.

-- Scott