When you use the Blogger, you may have an experience that Blogger says "We're sorry, but we were unable to complete your request" and it gives you something "bX" code and guides you that you need to report your issues to Blogger Support or on the Blogger Help Group. It does not give your more detail where exactly you need to report.
However, there is the bX-code Reporting Form that you can submit the "bX" code and the descriptions. Google does not response back to you when the issue is resolved, but you will just need to wait at least an hour or a day and come back to try it again.
[After you submit]
I don't know why they do not tell the form is existed.
The form itself is not professional enough and the customer service is not quite good.
Is it because the Blogger is free of service? I don't know.
(Read more inside...)










