Fix Bug for Odoo Website Theme

My Odoo site runs on a custom OWL-based theme and everything works until I try to update or add a section through the Website Builder. The moment I hit “Save” I get an error and the page refuses to render,... (Budget: ₹1500 - ₹12500 INR, Jobs: Debugging, Frontend Development, HTML, Odoo, Python, Software Development, Web Development, Website Design)