Cost Estimate error

Hi experts;

I've created a discussion on the SD section where there is an error I'm actually confused about.

The replay came to me informing that part of the issue is CO.

Actually, where I'm yet considered new to the CO I cannot solve its error

So, may you kindly refer to the error in the below link and please help and guide how to solve such issue.

Release billing documents for accounting issue

Thanks in advance;