Git push error pre-receive hook declined

Question

I have run gitlabhq rails server on virtual machine, following 1-6 steps from this tutorial https://github.com/gitlabhq/gitlab-recipes/blob/master/install/centos/README.md a

Answer 1

ihave followed the instruction of heroku logs img https://devcenter.heroku.com/articles/buildpacks#detection-failure ( use cmd: heroku logs -> show your error) then do the cmd: "heroku buildpacks:clear". finally, it worked for me!