If you’re encountering a 404 error while using the SeedProd editor, it may be related to the default Apache limit. To resolve this issue, you can either contact your hosting provider and request an increase in the Apache service limit or manually add the following code to your .htaccess file.

<IfModule mod_expires.c>
   SubstituteMaxLineLength 10M
</IfModule>

After making these changes, clear your WordPress cache, browser cache, and server cache to ensure the adjustments take effect. Then, check if the issue is resolved.