VMware Cloud Director 10.6.1
This issue will occur if the defined entity for the theme is stuck in the PRE_CREATED state indefinitely.
To resolve this issue there are two options available.
1) If the branding theme is no longer required, then it can be deleted using the following API call.
DELETE /1.0.0/brandingThemes/{brandingThemeId}
For more information see Delete Branding Theme.
2) If the branding theme needs to be retained, then the resolve this issue, contact Broadcom Support and note this Article ID (405829) in the problem description. For more information, see Creating and managing Broadcom support cases.