Internal error

class moo: cant load scripts
core_backtrace: internal error
   - core_backtrace(internal error,
     moo Object([w]=>900,
    [h]=>600,
    [debug]=>0,
    [js]=>js Object())) 		 /afs/.physto.se/common/www/tags/nordita.org/0.2/classes/core.php:1377
   - core_internalError(cant load scripts,
     moo Object([w]=>900,
    [h]=>600,
    [debug]=>0,
    [js]=>js Object())) 		 /afs/.physto.se/home/h/hvzm/norweb/trunk/_classes/moo.php:25
   - moo->moo()  /afs/physto.se/common/www/nordita2007.org/classes/headerNordita.php:683
   - headerNordita->convertConfiguration()  /afs/physto.se/common/www/nordita2007.org/classes/headerNordita.php:1058
   - headerNordita->getHeader()  /afs/physto.se/common/www/nordita2007.org/classes/headerNordita.php:1030
   - headerNordita->getPage()  timetables/index.php:10