Increasing WP Memory Limit is pretty quick and easy. You do not need great knowledge and we will show you how to do it below:
The first thing, Access your Web Hosting
Either Cpanel or Plesk, access your hosting and go directly to the directory where you have installed your site. Being in said directory, you must simply edit the file wp-config.php.
You should locate the following parameter near the end of the document:
define( 'WP_MEMORY_LIMIT', '96M' ); (the amount 96M can vary, but it does not matter).
Just replace the value with the necessary one and hit apply and save.
Now, there is a possibility that there is no such line and you will simply have to create it. This, somewhere before the line: /* That's all, stop editing! Happy publishing. */.
That's all, very simple and fast.