TypeError: Cannot set properties of null (setting ‘innerText’)

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

Theme’s name: Owly – Tutoring & eLearning WP Theme
https://themeforest.net/item/owly-tutor-wordpress-theme/23394631?gclid=Cj0KCQjwlK-WBhDjARIsAO2sErQTRd9G9zJugDFADACHcy-5oN9Qp5_Sw2iHCdPyLXXAP2CUrzJ_pJ8aAu8yEALw_wcB

That’s the list of plugins i use:
Advanced Custom Fields PRO
Akismet Anti-Spam
Contact Form 7
Cookie and Consent Solution for the GDPR & ePrivacy
Custom Post Type UI
DesignThemes Core Features Plugin
DesignThemes Portfolio Addon
eMailChef
Envato Market
WordPress Importer
Join.chat
Kirki Customizer Framework
LayerSlider WP
Post Duplicator
Slider Revolution
SVG Support
Ultimate Addons for WPBakery Page Builder
Unyson
Widgets for Google Reviews
Widgets for Social Reviews & Recommendations
WP Google Map Plugin
WP Maintenance Mode & Coming Soon
WPBakery Page Builder

Thanks a lot

Try switching to the default theme and deactivating all plugins excluding Contact Form 7, Akismet Anti-Spam, and WordPress Importer.

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