Cannot clone repo in custom pipeline

[Martynas Šustavičius]

I have a shell script that checks out separate repository and makes changes to it.

That same script works fine when invoked via merge to development hook.

But when I try to run it using custom pipeline I get following error:

./script.sh

Checking out repositories

Cloning into 'my-repository'...

Warning: Permanently added the ECDSA host key for IP address 'x.x.x.x' to the list of known hosts.

Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

Why could this be happening?

[Martynas Šustavičius]

I was not adding:

runs-on:
  - a
  - b
  - c