Error notification

Sorry An Error on our server has occured please inform us by sending a bug report.
Describe where you where and what you did and include the error message.
The error returned this:

Template not found:

Mail deNes about this error.

Thanks, deNes v.o.f.

Caller: Error_handling, /denes/productie/diplomacy/www/../modules/deNes/, 158
Caller: Template, /denes/productie/diplomacy/www/../modules/deNes/, 97
Caller: Template, /denes/productie/diplomacy/www/../modules/deNes/, 127
Caller: RSS, /denes/productie/diplomacy/www/../modules/deNes/RSS/, 69
Caller: main, /denes/productie/diplomacy/www/news/, 58