I'm using google apps for mail service. I have generated and submitted DKIM records for .co and .in domains successfully. But I'm not able to generate DKIM record for .net domain (say yourdomain.net). It shows an error we are unable to process your request at this time. Please try again later. (Error #1000). I have tried this for 2 .net domains. Both provide the same error. I have tried using in different browser and different machine, and the results are the same.
I am not sure if the issue is with the .net domain or if this is just a coincidence.
I had a "Google Apps for Work" account and wanted to setup DKIM for Google Apps email and another provider and I couldn't do it. I contacted Google Apps support and they said it was a bug with no immediate plans to fix it.
I got the same useless error code you did. I'm disappointed in Google about this. They just leave the broken submit form up, leaving it to the user to contact support to find out it's broken with no plans to fix it.
I'm going to cancel my paying google apps account.