Secret Detection job failing with image not found

I am trying to integrate the job in my CI with " Security/Secret-Detection.gitlab-ci.yml" in the include. But for now it is failing at the very start, saying it can’t find Docker image “/secrets”.

This docker image path is weird, I think there is some env variable to be set somewhere in order to have something before the slash.

But looking at the documentation, Secret Detection | GitLab does not provide any hint about that.

Any clue?