Fatal error: Uncaught TypeError: Argument 1 passed to MyRedis::set() must be of the type string, null given, called in /var/www/bulbul.su/html/app/models/myyt.php on line 250 and defined in /var/www/bulbul.su/html/app/models/MyRedis.class.php:81 Stack trace: #0 /var/www/bulbul.su/html/app/models/myyt.php(250): MyRedis->set(NULL, '{\n "error": {\n ...', 60) #1 /var/www/bulbul.su/html/app/controllers/playlist.php(16): getPlaylist(NULL) #2 /var/www/bulbul.su/html/app/router.php(191): include('/var/www/bulbul...') #3 /var/www/bulbul.su/html/app/core.php(39): require_once('/var/www/bulbul...') #4 /var/www/bulbul.su/html/index.php(8): require_once('/var/www/bulbul...') #5 {main} thrown in /var/www/bulbul.su/html/app/models/MyRedis.class.php on line 81