Problems with git submodules in Gitlab CI

If you are using git submodules in Gitlab CI, you might run into a "The project you were looking for could not be found or you don't have permission to view it."

Gitlab added a feature that new projects are no longer allowed to be cloned inside CI runs of other repositories by default. To fix this

• Go into the project used as a submodule
• Go to "Settings" -> "CI/CD" (if you don't see this section, enable it in "Settings" -> "General" -> "Visibility, project features, permissions")
• Go to "Token Access"
• Either disable "Limit access to this project" or add the project using the submodule to the allowlist