It is not possible to open Operations > Services > WebHosting Plesk > Branding. It fails with the generic error message:
An unexpected error occurred. Please try again later.
Moreover, there is a failed task "Unprovisioning "BrandSubdomain" for APS application WebHosting Plesk" with the below output:
'500 Internal Server Error' received from 'DELETE https://188.8.131.52:6301/web/BrandSubdomain/83c776f8-a9b8-4d8a-a5dd-0f9186d646b1': Empty result from APSC by the following link: APS\Link Object ( [id] => [href] => aps/2.2/resources/83c776f8-a9b8-4d8a-a5dd-0f9186d646b1/brandSubdomain [link] => strong [name] => brandSubdomain [collection] => )
Incomplete WebHosting Plesk brand subdomain removal provokes such situation to appear. This is recognized as software-related issue #WHM-11202.
A fix is planned in future software updates.
To workaround the issue, contact CloudBlue Technical Support.