Hello,
To further troubleshoot and resolve this issue, I recommend reaching out to the Ninja Forms Customer Success team. They have specific expertise and knowledge about the plugin and may be able to provide further assistance or guidance on how to disable the PHP-deprecated messages effectively.
If you haven’t already done so, consider updating your version of Ninja Forms to the latest available release ( 3.6.28 ), as newer versions often include bug fixes and improvements that might address this issue.
I apologize for any frustration caused by this ongoing problem. It’s important to ensure that the error reporting configuration in your wp-config.php file is properly set to suppress the deprecated messages. The support team for Ninja Forms will be in the best position to help you troubleshoot and resolve this issue. ( click here )