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.