1. What this error means
Extension or upgrade did not unlock after purchase.
2. Likely cause
Callback signature, shared secret, entitlement endpoint or payment confirmation failed.
3. How to check
Check webhook/callback logs and shared secret.
4. Exact fix
Resend the signed callback only after confirmed payment.
5. Related products
This code can apply to one or more Eggy products depending on where the error appears.
6. When to contact support
Contact support only after checking the listed fix. Include product, edition, version, URL/path, screenshot, PHP/MySQL version and the exact error code.
Still stuck? Run Diagnostics and include the product, edition, version, exact error and screenshot in your support request.