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:
    0.0003     149208   1. {main}() /var/www/chemiewerkt/index.php:0
    0.0278     617424   2. SJB_System::init() /var/www/chemiewerkt/index.php:58
    0.2306    4007700   3. SJB_ModuleManager->executeModulesStartupFunctions() /var/www/chemiewerkt/system/core/System.php:242
    0.2313    4049624   4. ThemeManager::getCurrentTheme() /var/www/chemiewerkt/system/core/ModuleManager.php:351
    0.3064    5056424   5. SJB_I18N->switchLang() /var/www/chemiewerkt/system/core/TemplateSupplier.php:271
    0.3064    5056448   6. I18NSwitchLanguageAgent->execute() /var/www/chemiewerkt/system/core/I18N.php:100
    0.3064    5056544   7. I18NSwitchLanguageAgent->fetchExistLanguage() /var/www/chemiewerkt/system/ext/I18N/I18NSwitchLanguageAgent.php:52
    0.3065    5057016   8. SJB_I18N->languageExists() /var/www/chemiewerkt/system/ext/I18N/I18NSwitchLanguageAgent.php:77
    0.3084    5061688   9. SJB_LanguageExistsValidator->isValid() /var/www/chemiewerkt/system/core/I18N.php:539
    0.3084    5061756  10. I18NDataSource->getLanguagesData() /var/www/chemiewerkt/system/lib/Validation/LanguageExistsValidator.php:35
    0.3084    5061780  11. I18NLanguageDataSource->getLanguagesData() /var/www/chemiewerkt/system/ext/I18N/I18NDatasource.php:158
    0.3084    5061916  12. Translation2AdminWrapper->getLangs() /var/www/chemiewerkt/system/ext/I18N/I18NLanguageDataSource.php:75
    0.4921    5069504  13. Translation2AdminWrapper->getLang() /var/www/chemiewerkt/system/ext/I18N/Translation2AdminWrapper.php:90
    0.4921    5069504  14. I18NAdminRepository->get() /var/www/chemiewerkt/system/ext/I18N/Translation2AdminWrapper.php:73