Fatal Error : WordPress after installing

Hello Everyone

Just installed WP and im having this error :

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 1966080 bytes) in /home/******/wp-includes/class-simplepie.php on line 5410

Already added this define(‘WP_MEMORY_LIMIT’, ‘256M’); to my wp-config.php file located in the root of the site, but i still have the errors.

Also changed to memory_limit = 256M; in my php.ini file.

Please can someone give me a hand on this error?

Thanks alot