Error: Call to undefined method Drupal\Component\Utility\Unicode::strlen() in import_1c_import_catalog() (line 73 of /var/www/a20190325/data/www/kabelpro.com.ua/modules/glyanec/import_1c/import_1c.module).

import_1c_import_catalog() (Line: 449)
import_1c_cron()
call_user_func_array('import_1c_cron', Array) (Line: 392)
Drupal\Core\Extension\ModuleHandler->invoke('import_1c', 'cron') (Line: 250)
Drupal\Core\Cron->invokeCronHandlers() (Line: 136)
Drupal\Core\Cron->run() (Line: 75)
Drupal\Core\ProxyClass\Cron->run() (Line: 65)
Drupal\automated_cron\EventSubscriber\AutomatedCron->onTerminate(Object, 'kernel.terminate', Object)
call_user_func(Array, Object, 'kernel.terminate', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.terminate') (Line: 100)
Symfony\Component\HttpKernel\HttpKernel->terminate(Object, Object) (Line: 32)
Stack\StackedHttpKernel->terminate(Object, Object) (Line: 687)
Drupal\Core\DrupalKernel->terminate(Object, Object) (Line: 22)