I am having issues with my JPageBuilder extension.

When I import the template (doesn't matter which one) I get a message that the import was successful. When I try to save the page I get an error: Request failed with status code 413 I was getting a similar error when I attempted to upload the JPageBuilder extension.
My server admin corrected the problem by increasing the SecRequestBody Limit in /etc/httpd/conf.d/mod_security.conf file.

I have been running JoomlaArt templates on this server (by the way this is a dedicated NodeWorx server from LiquidWeb) with no problems. I also have really high values in my php.ini file so I know that isn't the issue. I can save a blank page. I can successfully save a page that has had a widget installed. But ever time I attempt to use the template I get an error. Any idea what I might do to correct this?

Hello,

the error "Request failed with status code 413" typically means "Payload Too Large", which indicates that the request body (likely the page content) exceeds the server’s allowed limit.

Here you find detailed documentation about how to troubleshooting this issue with your server admin: https://blog.hubspot.com/website/413-request-entity-too-large

These are recommended standard settings for JPageBuilder:

PHP: memory_limit: 256 MB or 512M
PHP: post_max_size: 128M
PHP: upload_max_filesize: 32M or higher
PHP: max_execution_time = 300

So you can set these values in CPanel or talk with Hosting Support.