Fatal Error conflict

Looks like the function is_preview_mode is conflicting with some other themes/plugins:

Uncaught Error: Call to a member function is_preview_mode() on null in /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/admin/plugin-functions.php:47
Stack trace:
#0 /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/admin/plugin-functions.php(18): pblzbg_is_builder_page()
#1 /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/init.php(37): require_once('...')
#2 /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/init.php(18): PBLZBG_Init::admin_init()
#3 /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/init.php(40): PBLZBG_Init->__construct()
#4 /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/lazyload-bg.php(22): require_once('...')
#5 /home/nginx/domains/domain.com/public/wp-settings.php(453): include_once('...')
#6 phar:///usr/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1349): require('...')
#7 phar:///usr/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1267): WP_CLI\Runner->load_wordpress()
#8 phar:///usr/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(28): WP_CLI\Runner->start()
#9 phar:///usr/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php(83): WP_CLI\Bootstrap\LaunchRunner->process()
#10 phar:///usr/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php(32): WP_CLI\bootstrap()
#11 phar:///usr/bin/wp/php/boot-phar.php(20): include('...')
#12 /usr/bin/wp(4): include('...')
#13 {main}
  thrown in /home/nginx/domains/domain.com/public/wp-content/plugins/lazyload-background-images/admin/plugin-functions.php on line 47

Where we found a possible conflict:

themes/lemon-limes/includes/functions.php
plugins/elementor/core/base/elements-iteration-actions/assets.php
plugins/elementor/core/documents-manager.php
plugins/elementor/core/page-assets/loader.php
plugins/elementor/includes/managers/icons.php
plugins/elementor/includes/frontend.php
plugins/elementor/includes/preview.php
plugins/elementor/includes/maintenance-mode.php
plugins/elementor/includes/compatibility.php
plugins/elementor/includes/base/widget-base.php
plugins/optinmonster/OMAPI/Elementor.php
plugins/optinmonster/OMAPI/Elementor/Widget.php
plugins/wpforms-lite/src/Integrations/Elementor/Elementor.php