XML failed schema validation: Invalid XML: Datatype error:  100Type:InvalidDatatypeValueException, Message:Value'4684796' with length '7' is less than minimum length facet of '8'. ABS-104

Absolute Accounts Companies House Online Filing Errors.  

This rejection will relate to the company's registered number. This needs to be 8 digits, so if you have a 7 digit number you will need to enter a leading zero and then regenerate the accounts.