Could not read from remote repository

Cloning into 'jumpstart-pro'...
git@gitlab.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Any guidance on how to move forward with this issue ?

Make sure you've connected your Gitlab account in JumpstartRails.com and you're cloning the repo using the same SSH key on your Gitlab account.