Error in Quickbooks Online

When I try to connect to QBO through the Consolibyte package I downloaded, I get an error.

Error code: internal_error

Message: error while receiving application from request token

I installed the config.php file as instructed and even got the ability to authorize the application with Quickbooks, but now when I go to the page it means I am not registered and when I click the "Connect to QuickBooks" button on the index page. php. I am getting the error above. I don't know enough about the process to know where to start troubleshooting this issue, and any help would be greatly appreciated.