после запуска крон
в журнале появились вот эти ошибки
2019-10-17 0:00:03 - PHP Warning: fopen(/home/----/www/system/storage/cache/cache.length_class.1.1571263203): failed to open stream: No such file or directory in /home/---/www/system/library/cache/file.php on line 28
2019-10-17 0:00:03 - PHP Warning: flock() expects parameter 1 to be resource, boolean given in /home/---/www/system/library/cache/file.php on line 30
2019-10-17 0:00:03 - PHP Warning: fread() expects parameter 1 to be resource, boolean given in /home/---/www/system/library/cache/file.php on line 32
2019-10-17 0:00:03 - PHP Warning: flock() expects parameter 1 to be resource, boolean given in /home/---/www/system/library/cache/file.php on line 34
2019-10-17 0:00:03 - PHP Warning: fclose() expects parameter 1 to be resource, boolean given in /home/---/www/system/library/cache/file.php on line 36