Cloud Translation Permission

[jbrandenburgf1]

So I'm pulling my hair out over this and reaching out here for help. I'm trying to set up a service account with Cloud Translation, and Text-to-speech enabled, but we keep getting this response:

 [error]  {
    "message": "Cloud IAM permission 'cloudtranslate.generalModels.predict' denied. ",
    "code": 7,
    "status": "PERMISSION_DENIED",
    "details": []
} 

I have confirmed that the service account has the "cloudtranslate.generalModels.predict" permission, and showing the "Cloud Translation API User" role. We've also confirmed that it works with a different Service account that my colleague set up in his personal Google console profile. But, we need this setup with an account through our org. 

I did verify that the service account has the permission from the https://console.cloud.google.com/iam-admin/troubleshooter so and that my organization's admin sees that the service account is granted access through ancestor policies.  

So what else can we check?