Fatal error: Call to a member function getLanguagePages() on a non-object in /var/www/chemiewerkt/system/ext/I18N/I18NAdminRepository.php on line 91

Call Stack:
    0.0004     148940   1. {main}() /var/www/chemiewerkt/index.php:0
    0.0348     617164   2. SJB_System::init() /var/www/chemiewerkt/index.php:58
    0.2892    4005120   3. SJB_ModuleManager->executeModulesStartupFunctions() /var/www/chemiewerkt/system/core/System.php:242
    0.2899    4047044   4. ThemeManager::getCurrentTheme() /var/www/chemiewerkt/system/core/ModuleManager.php:351
    0.3582    5053784   5. SJB_I18N->switchLang() /var/www/chemiewerkt/system/core/TemplateSupplier.php:271
    0.3582    5053808   6. I18NSwitchLanguageAgent->execute() /var/www/chemiewerkt/system/core/I18N.php:100
    0.3582    5053904   7. I18NSwitchLanguageAgent->fetchExistLanguage() /var/www/chemiewerkt/system/ext/I18N/I18NSwitchLanguageAgent.php:52
    0.3583    5054376   8. SJB_I18N->languageExists() /var/www/chemiewerkt/system/ext/I18N/I18NSwitchLanguageAgent.php:77
    0.3584    5059048   9. SJB_LanguageExistsValidator->isValid() /var/www/chemiewerkt/system/core/I18N.php:539
    0.3584    5059116  10. I18NDataSource->getLanguagesData() /var/www/chemiewerkt/system/lib/Validation/LanguageExistsValidator.php:35
    0.3584    5059140  11. I18NLanguageDataSource->getLanguagesData() /var/www/chemiewerkt/system/ext/I18N/I18NDatasource.php:158
    0.3585    5059276  12. Translation2AdminWrapper->getLangs() /var/www/chemiewerkt/system/ext/I18N/I18NLanguageDataSource.php:75
    0.5329    5066864  13. Translation2AdminWrapper->getLang() /var/www/chemiewerkt/system/ext/I18N/Translation2AdminWrapper.php:90
    0.5329    5066864  14. I18NAdminRepository->get() /var/www/chemiewerkt/system/ext/I18N/Translation2AdminWrapper.php:73