I’m running WordPress with the Moderno theme and Elementor Pro. Everything behaves perfectly on normal pages and WooCommerce archive templates, yet the moment I open Theme Builder to create or edit a Header or Footer I’m met with a generic PHP fatal error (“There has been a critical error on this website”). Because the message doesn’t expose a stack trace I can’t say for certain whether it fires every single time, but it happens often enough to block all work. I have already cleared caches, enabled WP_DEBUG, deactivated non-essential plugins, and tried the usual memory tweaks—no luck so far—so I need a seasoned WordPress / PHP troubleshooter to dig deeper. Deliverables • Diagnose the root cause of the Header/Footer crash in Elementor Theme Builder. • Apply a clean, update-safe fix that leaves Elementor Pro, Moderno and WooCommerce fully functional. • Provide a brief summary of what was changed so I can replicate the solution on other environments. Acceptance criteria: I can open, edit, save and display custom headers and footers in Elementor without triggering any PHP error. The budget is a firm 50 CAD; please bid only if that suits you.