You are not allowed to force push code to a protected branch on this project.

This error message typically occurs when a user tries to force push changes to a protected branch on a Git repository where force pushing is not allowed. Protected branches are often used to prevent accidental deletion or modification of important branches in a repository.

If you encounter this error, there are a few steps you can take:

1. Make sure that you have the necessary permissions to make changes to the branch. You may need to contact the repository owner or an administrator to ask for permission.

2. Instead of force pushing, consider creating a new branch and making your changes there. Once you have tested your changes and are confident that they work, you can merge them into the protected branch using a pull request.

3. If you are certain that you need to force push to the protected branch, you may need to disable branch protection temporarily. However, this should only be done in exceptional circumstances and with the permission of the repository owner or an administrator.