Runner cannot access repo

I’m a newbie in Gitlab, just starting to use this week. When I pushed my existing repository to Gitlab, the Auto DevOps start running, but ends up failed.

I’m using:

There are several errors in the log. I have no idea where to start. I searched this forum but couldn’t get anyone with similar issue as me.
Thanks for taking the time to be thorough in your request, it really helps! :blush: