Hi there,
I accessed your website and installed the WP Server Info plugin which you can access from Dashboard > WP Server Info menu which shows your hosting service provider details.
Please follow the troubleshooting steps below:
- Contact your hosting service provider and ask them to update the PHP version to at least 5.6 or 7.1
- If you’re using a CDN, please clear the CDN’s cache and disable optimization services.
- Remove custom CSS and Javascript from the options or Child Theme and test the case.
- Reset your htaccess file by renaming it to
.htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button.
- Increase the PHP Memory Limit of your server. Click here for more detailed information and how to increase the PHP memory limit. The case for you is 512MB but it seems the problem is happening for a large page so try the 1000MB
Tell us if it fixes the issue, and also if this is happening only for a specific age or all pages.
Thank you.