The user is not able to upload Approved Email asset renditions to Vault as a bulk action.
The user is attempting to upload the Approved Email asset renditions using the Vault API, which is not currently supported when performed as a Bulk Action.
The solution is to perform this as a Bulk Action using the Vault User Interface, which is currently supported.
Vault Approved Email Documentation: Setting up Approved Emails (PromoMats & MedComms)
Send us your feedback: We are always looking for feedback to help improve our Knowledge Base! Please let us know if this article is helpful or provide feedback on how we can improve your experience by clicking here.