Aug 9, 2021
Hi Marius,
At the moment it only works with public images (Google Drive files shared with "anyone with the link")
https://support.google.com/drive/answer/2494822?hl=en#zippy=%2Cshare-a-file-publicly
Written by Romain Vialard
Google Developer Expert, creator of several successful add-ons for Gmail, Drive,...