subprocess.CalledProcessError: Command 'git tag' returned non-zero exit status 1.

This error occurs when the Git command 'git tag' fails to execute properly. The non-zero exit status 1 indicates that there was an error during the execution of the command.

Possible reasons for this error include:

1. The Git repository is not initialized or is corrupted.
2. The user running the command does not have sufficient permissions to execute the command.
3. The Git version installed on the system is not compatible with the command being executed.
4. There is a conflict between the Git configuration settings and the command being executed.

To resolve this error, you can try the following steps:

1. Verify that the Git repository is initialized and functional.
2. Ensure that the user running the command has the necessary permissions to execute Git commands.
3. Upgrade or reinstall Git to ensure compatibility with the command being executed.
4. Check the Git configuration settings and modify them if necessary.

If none of these steps resolve the issue, you may need to seek further assistance from a Git expert or support team.