PHP Error [500]

Use of undefined constant SODIUM_LIBRARY_VERSION - assumed 'SODIUM_LIBRARY_VERSION' (this will throw an Error in a future version of PHP) (/mnt/data/shnoulle/nginx/www/develop/third_party/sodium/Sodium.php:33)

#0 /mnt/data/shnoulle/nginx/www/develop/framework/base/CApplication.php(834): CErrorHandler->handle()
#1 /mnt/data/shnoulle/nginx/www/develop/third_party/sodium/Sodium.php(33): LSYii_Application->handleError()
#2 /mnt/data/shnoulle/nginx/www/develop/third_party/sodium/Sodium.php(12): Sodium->checkIfLibraryExists()
#3 /mnt/data/shnoulle/nginx/www/develop/framework/base/CModule.php(394): Sodium->init()
#4 /mnt/data/shnoulle/nginx/www/develop/framework/base/CModule.php(103): LSYii_Application->getComponent()
#5 /mnt/data/shnoulle/nginx/www/develop/application/models/LSActiveRecord.php(305): LSYii_Application->__get()
#6 /mnt/data/shnoulle/nginx/www/develop/application/models/LSActiveRecord.php(293): SurveyDynamic->decryptEncryptAttributes()
#7 /mnt/data/shnoulle/nginx/www/develop/application/models/SurveyDynamic.php(121): SurveyDynamic->encryptSave()
#8 /mnt/data/shnoulle/nginx/www/develop/application/helpers/expressions/em_manager_helper.php(5508): SurveyDynamic->insertRecords()
#9 /mnt/data/shnoulle/nginx/www/develop/application/helpers/expressions/em_manager_helper.php(5335): LimeExpressionManager->_UpdateValuesInDatabase()
#10 /mnt/data/shnoulle/nginx/www/develop/application/helpers/SurveyRuntimeHelper.php(948): NavigateForwards()
#11 /mnt/data/shnoulle/nginx/www/develop/application/helpers/SurveyRuntimeHelper.php(647): SurveyRuntimeHelper->setMoveResult()
#12 /mnt/data/shnoulle/nginx/www/develop/application/helpers/SurveyRuntimeHelper.php(204): SurveyRuntimeHelper->initMove()
#13 /mnt/data/shnoulle/nginx/www/develop/application/controllers/survey/index.php(604): SurveyRuntimeHelper->run()
#14 /mnt/data/shnoulle/nginx/www/develop/application/controllers/survey/index.php(24): index->action()
#15 /mnt/data/shnoulle/nginx/www/develop/framework/web/actions/CAction.php(76): index->run()
#16 /mnt/data/shnoulle/nginx/www/develop/framework/web/CController.php(308): index->runWithParams()
#17 /mnt/data/shnoulle/nginx/www/develop/framework/web/CController.php(286): SurveyController->runAction()
#18 /mnt/data/shnoulle/nginx/www/develop/framework/web/CController.php(265): SurveyController->runActionWithFilters()
#19 /mnt/data/shnoulle/nginx/www/develop/framework/web/CWebApplication.php(282): SurveyController->run()
#20 /mnt/data/shnoulle/nginx/www/develop/framework/web/CWebApplication.php(141): LSYii_Application->runController()
#21 /mnt/data/shnoulle/nginx/www/develop/framework/base/CApplication.php(185): LSYii_Application->processRequest()
#22 /mnt/data/shnoulle/nginx/www/develop/index.php(194): LSYii_Application->run()