Envato Elements Template Kits - export Problems

Hello i just cretated a template kit using elementor and addon eement pack
when i try to export i get this error :

Please remove any inline class="flat-toggle" from FAQ


any help please, thank you in advance

Hello!

Make sure nothing is outputting HTML or CSS in your templates, this can include using custom classes under Advanced tab of widgets, or shortcodes (not allowed), the HTML widget or copy/pasting HTML formatted content into a text editor widget\ (such as in an accordion or tab content area)