Hello @Deanter, welcome to the Make Community 
Thank you for bringing this up here.
It seems that the error message you’re encountering is likely coming directly from Instagram/Meta. To troubleshoot, please try
- deleting and setting up the module again.
- creating a new connection might help.
Here’s a guide on how to do this: Instagram for Business
It’s worth noting that similar cases have been reported where the issue resolved itself over time. This seems to be a known issue with Meta. Here’s an example thread from the Meta Developer Community.