Hi @Boris_Idesman, the “Not found” error would be coming from the GitHub API. This is the default GitHub response when trying to access entities a user doesn’t have access to and differs a bit from other services.
When using GitHub trigger, n8n would try to register a new webhook with GitHub which (iirc) only repository owners can do. Can you confirm whether you are the owner of the repository you’re trying to use the trigger with?
Thank you for the support, @MutedJam !
I don’t have any other triggers except the Start node.
In my case the workflow switched for 1 second and then failed with the error from above.
Anyway, I will monitor and report if I observe similar behaviour again.