I followed the directions on installing the theme and the demo content, but all I get is a black screen and I can’t edit anything. I get an error code. This is my second request for help; I urgently need support with this problem!
There has been a critical error on this website:

Fatal error: Uncaught Error: Call to a member function get_builder_content_for_display() on null in /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-content/plugins/cowidgets-elementor-addons/inc/class-cowidgets.php:328 Stack trace: #0 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-content/plugins/cowidgets-elementor-addons/inc/ce-functions.php(88): CoWidgets::get_header_content() #1 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-includes/class-wp-hook.php(324): cowidgets_render_header() #2 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #3 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-includes/plugin.php(517): WP_Hook->do_action() #4 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-content/themes/remake/includes/codeless_hooks.php(14): do_action() #5 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-content/themes/remake/header.php(46): codeless_hook_wrapper_begin() #6 /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-includes/template.php(810): require_once(‘/var/www/vhosts…’) #7 /var/www/vhost in /var/www/vhosts/nxsoft.pt/blaz.nxsoft.pt/wp-content/plugins/cowidgets-elementor-addons/inc/class-cowidgets.php on line 328