problems with updating

Where can we see the website in question?

Hi,
this is the link https://www.mediaaffiche.it/preventivi/

thanks

What other plugins and theme do you use on the site?

Hi,

theme DFD Ronneby Theme

plugin
– All in one SEO
– Campi personalizzati avanzati
– Contact Form 7 (5.3.2)
– GDPR Cookie Consent Banner
– Installer Plugin
– Theme Security
– Ronneby Theme Core
– Slider Revolution
– SMK Sidebar generator
– Tiny MCE Advances
– Wp Fast cache
– Wp Maintenance Mode
– WP Bakery Page Builder
– Yoast Duplicate post

Thanks

Try switching to the default theme, deactivating all plugins excluding Contact Form 7, and clearing all cache data.

Why you are advised to deactivate plugins and switch to the default theme.

Hi, solved.
the problem was the WP faste cache plugin.
Thanks