Organization Has Reached Its Usage Limits" Error with 0 Devices - Troubleshooting Guide

I'm developing a custom MDM solution using Google Android Management API. Successfully created enterprise enterprises/LC02x32bm6 with work email domain, but getting:

"Can't set up device. Your organization has reached its usage limits."

Key Details:

• Enterprise created successfully via API
• Enrollment token generated successfully
• 0 devices currently enrolled
• Cloud Console shows 0% API quota usage
• Billing account linked to project
  
  
  GET /api/enterprise/callback → Returns enterpriseName
  POST /api/enterprise/enrollment-token → Returns enrollment token
  Device enrollment → ❌ "Usage limits" error
  
  

  Has anyone encountered this "usage limits" error with 0 devices?
  Android Management API usage is 0%. 
  
  Any insights appreciated! Happy to share code snippets or API responses if helpful.