Layout sync error in Content (expects 6 zones but rendering 5) on empty pages

Hi TagDiv Support Team,

I am experiencing a persistent error with TagDiv Composer on my website (hosted on SiteGround). Every time I try to edit or create a page—even a completely fresh, empty page—I get the following error:
“Layout sync error in Content. The editor expects 6 zones but the page is rendering 5.”

Here is what I have already checked and verified to isolate the issue:

PHP Version: The server is running on PHP 8.2.31.

Memory Limits: I have already increased limits in wp-config.php (WP_MEMORY_LIMIT set to 512M).

Plugins & Cache: The issue persists even on blank pages, with no third-party caching/minification conflicts.

System Status: In my Newspaper System Status panel, I noticed a warning regarding mod_substitute being active on Apache (“may cause a timeout error on TD Composer”). I tried tweaking the .htaccess file with SubstituteMaxLineLength and SubstituteEngine Off, but the error remains.

Since it happens even on blank pages, it’s definitely not an unclosed HTML tag in the content. Could you please let me know how to fix this rendering/sync conflict on PHP 8.2 / SiteGround?

Thank you,
Sara