@Liam-Shopify, at least 3 merchants have just reported an error when trying to open the Product Picker today (CDN App Bridge). This is as of a few minutes ago.
We don’t know the exact error message yet. AFAIK, all the errors we normally see when trying to open the picker have to do with user permissions to access products.
EDIT: Uploading the error message.
By the way, these merchants have been using the product picker for a long time. They certainly have the right permissions. I also managed to reproduce the error by logging into a merchant’s account on which I have product access, and I got the same error.
I’ve got the same issue today too, with 3.7.9 and 3.7.10.
Strangely works for some of my stores but not my others. All stores have permission to read/write to products.
Just noticed it started working again 
Thanks for the report! We’ve identified the problem and rolled out a fix for it. Please let us know if you’re still experiencing the issue.
Thanks! It looks to be resolved now.
