A service isn't working
Its row in Settings → Tools says what's wrong, and these fix it.
Can't reach it
A device couldn't connect to its address, or it was too slow.
Fix: Check the address, and that the device can reach it: if it's on your VPN or Tailscale, the device must be too. eris tries again by itself.
The token was turned away, or expired
The service didn't take the token.
Fix: Make a new one at the service, then press Replace token.
Needs you to sign in again
The sign-in ran out, or was revoked at the service.
Fix: Press Sign in again.
Not on any device, or in any chat
No device has it, or it's set to no chats, so Claude never sees it.
Fix: Press Choose devices or Choose chats.
Needs a newer eris
A device's eris is too old for this service.
Fix: Update eris on that device.
Its address is refused
eris never reaches cloud metadata or link-local addresses, and uses plain http:// only off the public internet.
Fix: Use the server's own address, with https:// if it's public.