When trying to register/configure an account in Sourcetree for Mac using an API token, the Save button remains disabled/greyed out, preventing the user from completing the account setup.

The same account setup and API token work successfully on Windows, which suggests this may be specific to Sourcetree for Mac.

Steps to reproduce

1. Open Sourcetree for Mac.

1. Go to account registration/account setup.

1. Enter account details using an API token.

1. Observe the Save button.

Expected result
The Save button should become enabled once all required account details are entered correctly, allowing the user to complete the account registration.

Actual result
The Save button remains disabled/greyed out, so the account cannot be registered.

Related forum report: https://community.atlassian.com/forums/Sourcetree-questions/Sourcetree-for-Mac-v4-2-17-quot-Save-quot-button-is-disabled/qaq-p/3242900