Why am I getting "HTTP Request error: 400 Client Error: Bad Request" trying to set up the Box App for Splunk on a heavy forwarder?

So, I go into the Box App for Splunk on my Heavy Forwarder to do initial configuration. I successfully configure the app and validate the oauth information with my Box admin account. However, I notice I'm not getting any data. Looking in the splunkd log I'm seeing the following error. ERROR ExecProcessor - message from "python /apps/splunk/etc/apps/BoxAppForSplunk/bin/box.py" HTTP Request error: 400 Client Error: Bad Request The only thing I can think of is the account I have doesn't have access to the API, but wondering if anyone else has ran into this error.