Brunn theme 500 internal server error, caused by WPBakery

I purchased the Brunn theme for wordpress and when I try editing the page on wordpress, I get a 500 internal server error. This is the endpoint being hit:

I tried increasing the php memory but it didnt fix it. The issue is with the WPBakery plugin. If I disable the plugin, I can successfully edit the page, otherwise it gives an error. Any help would be appreciated.

Here are the error logs:

[Fri Apr 17 20:14:58.199094 2020] [substitute:error] [pid 2108:tid 140278455166720] [client] AH01328: Line too long, URI /wp-admin/post.php, referer: https://[mydomain]/

[Fri Apr 17 20:14:58.200338 2020] [proxy_fcgi:error] [pid 2108:tid 140278455166720] (12)Cannot allocate memory: [client] AH01075: Error dispatching request to : (passing brigade to output filters), referer: https://[mydomain]/


The “500 Internal Server Error” page you’re seeing means the Website is causing a fatal error. Usually, this can caused by an outdated version of PHP, but it could be potentially something else.

Before contacting the author of the Item, you should contact your web host to get some useful details:

  • Ask them for the exact error message causing the website to fail.
  • Also ask them to ensure your website is running PHP 7 or newer.

If hosting provider let you know that error is coming from the Website script then Contact your purchased Item Author. Contact Author and let them know.