Best Fixes
Verify which SSH key Git is actually presenting for that host and whether the repository account expects that identity.
Check both SSH configuration and repository-level access permissions on the hosting platform.
A focused fix path for Git hosting access problems when SSH authentication fails.
When Git operations over SSH fail with permission denied, the problem is usually the wrong key, wrong account, missing repository access, or a mismatch between local SSH config and the intended host identity.
Verify which SSH key Git is actually presenting for that host and whether the repository account expects that identity.
Check both SSH configuration and repository-level access permissions on the hosting platform.
Do not keep adding keys to the platform without confirming which account and host mapping you really need.
Do not assume the repository URL is correct if the host alias in SSH config points somewhere unexpected.