Thanks for contacting the Ad Manager API team, this is Yasmin. Please note that I had to remove your initial post as it contained sensitive information. Kindly refrain from posting private information as this is a public forum, moving forward.
Can you confirm if you're still unable to retrieve data given that query? If yes, can I ask for you to provide the complete and latest SOAP request and response logs (SOAP logging must be enabled) as well as for getCurrentUser() so we're able to further investigate this on our end? You may send them via Reply privately to author option.