Okay. I see what the problem was. The instagram account was linked to a personal Facebook account which was private so the posts didn’t show up. I changed it to a instagram business account and correctly linked it with the Facebook page instead of personal account. This all has to be done on mobile as the options don’t show up on the web interface, so I had to get on the clients phone to get it working. It works fine now! Sorry for the inconvenience and thanks for the help!
I re installed the data and it’s the same for the imported version. The Instagram feed isn’t appearing. Also in the media viewer all the images are greyed out.