Hey @random6526514, welcome to the GitLab Community Forum! 
Namespaces on the Free plan get 2,000 CI minutes per month, resetting on the first of the month, which goes for both private and public groups and projects on GitLab.com.
That link is 404'ing for you because we moved where usage quotas are viewed for both groups and personal namespaces. So, depending on which you’re using you can find your pipeline minutes quota either by:
- Personal namespace: https://gitlab.com/profile/usage_quotas
- Group: Settings -> Usage Quotas