Hello Stefan
Thanks for sharing your site access. I have checked your site and tested with my APP ID. I could not use your APP ID because it would not work without your Facebook access. So, I tested with my Facebook APP ID. I managed to find the solution. I have taken a page Instagram and successfully fetched images from Instagram on that page using Instagram Gallery Addon.
https://prnt.sc/20xl7vj
Now, to use your APP ID, you need to follow the steps:
- Go to https://developers.facebook.com/apps
- On your app, go to Facebook Login -> Settings
- Add Valid OAuth Redirect URIs
- Now in SP Page Builder settings, generate Access Token
(please check the hidden comment)
Best regards