Where can we see the website in question?
What other plugins and theme do you use on the site?
Theme: The Retailer
Plugins: Checkout Field Editor for WooCommerce
Contact Form 7
Disable Gutenberg
Envato Market
Deactivate
HookMeUp – Additional Content for WooCommerce
Imagify
One Click Demo Import
Perfect Images (Retina, Thumbnails, Replace)
Product Blocks for WooCommerce
Really Simple SSL
Premium Support | Settings | Deactivate
Really Simple SSL pro
Settings | Deactivate
Slider Revolution
The Events Calendar
The Retailer Deprecated Features
The Retailer Extender
The Retailer Portfolio Addon
Titan Anti-spam & Security
UpdraftPlus – Backup/Restore
WC Fields Factory
WooCommerce
WooCommerce Header Category Image
WooCommerce Shipping Per Product v2
WooSwatches – Woocommerce Color or Image Variation Swatches
Wordfence Security
WP fail2ban
WP Mail Logging
WP Rocket
WPBakery Page Builder
Yoast SEO
Try switching to the default theme, deactivating all plugins excluding Contact Form 7, WooCommerce, Wordfence Security and Yoast SEO, and clearing all cache data.
Why you are advised to deactivate plugins and switch to the default theme.