Staggs not workinf

I am trying to debug a strange issue on a WordPress site and would really appreciate some help. I have a configurator page here: https://tridentmodular.com.ua/configurator/garden/ Problem The page looks different depending on whether the visitor is logged in or not: Logged-in users / admin: the configurator appears normal Logged-out users / incognito: the layout is broken, and the page shows a WordPress-style “critical error” message near the bottom So this is not just a small CSS difference — the public version seems to break structurally. What I checked already Browser checks I opened DevTools in incognito: Console showed no obvious JS errors Network did not show anything clearly suspicious at first I may still need to inspect more carefully with cache fully disabled WordPress debug log I enabled WP_DEBUG and checked the log. The lines I found were mainly: Complianz notices about translations being loaded too early one warning from Kadence Blocks Pro: foreach() argument must be of type array|object, string given However, I am not sure that warning belongs to this configurator page specifically, because the log is global and this configurator itself does not directly use Kadence. What makes this confusing The problem happens only for logged-out users Logged-in admins see the page working I am not yet sure whether this is caused by: cache/optimization for guests AJAX not working for non-logged-in visitors a PHP fatal in the configurator code PDF/email functionality near the bottom of the page some global template/plugin conflict Extra clue The issue seems to happen around the area where the page renders the bottom controls such as: Send Email Download to PDF So I suspect that section may be related. My question What would you check first in a case where: a WordPress front-end page works for logged-in users breaks for logged-out users looks like a server-side/PHP issue rather than a pure CSS issue And specifically: could this be a missing wp_ajax_nopriv_* handler? could cache/optimization create this exact logged-in vs logged-out difference? what is the best way to isolate the exact fatal error for only this page request? If helpful, I can also share: screenshots of the two layouts the relevant configurator code debug log excerpts plugin stack Thanks a lot. The page I need help with: [ log in to see the link] Hello there, Sorry to hear the configurator breaks your website page Can you reach out to us via the support form on our website and provide login credentials so we can have a look at the situation? There might be a plugin or theme conflict causing the page to crash.