IDE Extension Ready--- Not Found (404)

I built an extension on IDE, and when it said it was ready I got a 404 aix not found error. This was within 10 seconds of getting the email.

It has happened twice in a row. Extension is ready, but it is not found.

Anyone else having issues?

Update - I tried a previous extension and it works. I think there is an error in the extension I am building, but I am not getting an error for it. Confirmed. This one extension says it is ready, but gives a 404 error.