I'd like to get a error handle server side event, where I can provide my own error message or rendering when exception happnes on document conversion. i.e., instead of client side popups I would rather pre-generate pdf document that will state something like "Error while generating document render. Please open document locally or contact support at XXX XXX-XXXXX" in nice corporate fonts and colors and pass it in collback and completely suppress error currently showing to users ("old version", "exception XXX", "password protected" etc etc). Our users do not need those details, we need just log it