Power BI Custom Connector - Access is Forbidden

Good morning!

I have used the connector for my work before and had no issues with pulling data down. However, on a consulting job I am working on where I have admin access to their database, and my app has full access/permissions I am still getting the 'Access to the resource is forbidden.' error.

I have tried rebuilding the connector on the chance I didn't save something right, remove the custom app from the company marketplace, and changed my permissions from read only to full. Sadly, I am at a loss and need to get the job completed soon to meet my deadlines.

Can anyone provide any guidance?

@Alex Wong - I've seen your name a lot helping in the forms… maybe you have a moment to lend me your expertise :D