Hmm that sucks. All I can suggest is you systematically remove content from the page until the error stops - this way perhaps you can identify the offending content (or combination of content which aggregates to an "offence")
There is no offending content here. We are not a SaaS company and we dont host content. We provide shrink ware software to other companies which they use to host content.
The person you are responding to is not talking about user-uploaded content.