An error occured: cPanel API Response: Access denied

Hey all, I am new to CPanel and all of the hosting industry. My reseller hosting provider gave me my login details and when I try to set up a new server in WHMCS I am unable to Verify Connection successfully. I have tried many times, I contacted my hosting provider and asked them for the details and they provided me with this: Hostname/IP: uksrv2.hostaname.tld/ username: exxelo password: Hidden primary IP: As per the package subscribed there is no dedicated or Primary IP. primary nameserver: ns1.domain.tld secondary nameserver:ns2.domain.tld
In the WHMCS setup it asks for a primary IP however I was informed this is no necessary. I Filled out the form to setup a new server in WHMCS and when I clicked the button shown in the screenshot, I get the error: An error occured: cPanel API Response: Access denied. I don't know what to do so I came here for support. Thanks in advance, Rifta