May I have the client id of the application? Also - when you say “personal” Box account - do you mean like a free account? If so, you would need to have access to the Admin Console/paid business and above account in order to use CCG applications.
It is a free account using my personal email address. It would be great if you could kindly grant temporary authorization for API testing purposes only. This is necessary since our company-provided enterprise account does not permit testing activities.