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from your cPanel. In order to increase WordPress memory limit follow these steps:
1. Go to cPanel > Files section > File manager menu.
2. Navigate to the root folder of your domain (by default, it is public_html for the main domain and addondomain.tld for the addon domains). Select wp-config.php file and click Edit. It is also possible to change WP_MEMORY_LIMIT by going to wp-includes folder of the installation and editing default-constants.php file.
3. Change the WP Memory limit. That’s all. Click save editing.
Change the Memory size as you want. Check your cPanel memory size and set the WordPress Memory.