Missing service account key or bundle ID.

Hello, I'm using Adapty for the first time. I'm about to publish an app on the App Store. I've completed the App Store settings with Adapty and now I want to add a new product, but I keep getting this error in the "Create new product group" section:

Missing service account key or bundle ID.

I added my app's bundle ID from the App Store to Adapty, and I can see it's correct and registered, but it still gives me this error. Adapty doesn't even allow me to add a product if there's a missing field in this section anyway. How can I resolve this error?