Cannot add custom SSL certificate in AppEngine dash

Question

I've followed the instructions provided in the docs to the letter with no luck. I receive Error - The SSL certificate provided could not be inserted. without any additional message as to why.

Looking under the hood, the console sends a POST request which comes back with a status 400 and the following JSON:

{"code":1,"errorSpace":"domains","status":400,"message":"1"}

For Google folks here, the above might mean something.

Answer 1

In my case, re-ordering the concatenated certificates in this order solved it:

• domain cert
• intermediate cert
• ca cert

Answer 2

I had same problem. In my case error was caused by too long RSA private key. Retrying with certificate generated with 2048 key solved the issue.