You can fix error “413 Request Entity Too large” By Increasing Upload File Size with .htaccess File
Step::1 Login to your cPanel account and open File Manager section.
Step::2 Next, in File Manager, your website’s folders should be under the folder named ‘public_html’.
Step::3 You should see a file named ‘.htaccess’ here. If you don’t, you can use the search bar on the top-right of the screen to look for it.
Step::4 If your website has a .htaccess file but you can’t see it, visit Settings tab and click on ‘show hidden files.’
Step::5 Open the .htaccess file by right-clicking and choosing ‘Edit’.
Step::6 To Increase Upload File Size and fix 413 Request Entity Too Large Error in WordPress, paste the following code to this file:
php_value upload_max_filesize 64M
php_value post_max_size 64M
php_value max_execution_time 300
php_value max_input_time 300
Step::7 Click on Save Changes tab and close the file.
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