Content
If you get a 502 error when you try to edit a page with the Elementor page builder plugin for WordPress you should first change the loader method.
Then you need to increase a particular Apache service limit. To do that, add the following lines in the website’s .htaccess file:
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<IfModule mod_substitute.c>
SubstituteMaxLineLength 10M
</IfModule>
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You can edit that file via SSH, FTP, or using the File Manager tool in cPanel.