Autobuilding of snap failing due to missing gpg key

I’ve got a snap that’s getting built by Snap’s auto-building Github integration, and it’s failing due to a missing GPG key when attempting to install the tools PPA:

The relevant error:

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F1831DDAFC42E99D

does this help ?

Thanks for the response. I don’t think so - I didn’t intend to install any PPA, and as far as I can tell, it’s an internal snapcraft PPA?

It looks like this was just a temporary failure, and fixed itself