Upload file to HubSpot from Google Drive Media Object

Anvil Q&A
2

Found the solution, so it’s not relevant anymore.
Maybe it would help someone. But you should better create the ad in two steps:

  1. load the file using /adimages: Graph API Reference v18.0: Ad Image - Documentation - Meta for Developers
  2. Once done - you can use the hash of the loaded image in the ad.
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