See what you can see on the server-side Apache logs - https://unix.stackexchange.com/questions/115972/how-do-i-find-where-apache-keeps-the-log-files (and others; or adjust for your Linux).
- E130003: The XML response contains invalid XML - svn co an... NOCERA, ANDY
- Re: E130003: The XML response contains invalid XML - ... Paul Hammant
- RE: E130003: The XML response contains invalid XM... NOCERA, ANDY
- Re: E130003: The XML response contains invali... Paul Hammant
- Re: E130003: The XML response contains in... Michael Rohan
- RE: E130003: The XML response contai... NOCERA, ANDY
- Re: E130003: The XML response co... Andreas Krey
- RE: E130003: The XML respons... NOCERA, ANDY
- Re: E130003: The XML respons... Paul Hammant
- RE: E130003: The XML respons... NOCERA, ANDY
- RE: E130003: The XML respons... NOCERA, ANDY
- Re: E130003: The XML respons... Johan Corveleyn