Fatal error: Uncaught Error: Class 'Elementor\Scheme_Color' not found in /home/customer/www/optimize.gr/public_html/wp-content/plugins/pixerex-elements/widgets/pr-logo.php:166 Stack trace: #0 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(2282): Elementor\PR_Site_Logo_Widget->_register_controls() #1 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(496): Elementor\Controls_Stack->init_controls() #2 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elementor/includes/base/widget-base.php(177): Elementor\Controls_Stack->get_stack() #3 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(300): Elementor\Widget_Base->get_stack() #4 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elementor/includes/base/controls-stack.php(2371): Elementor\Controls_Stack->get_controls() #5 /home/customer/www/optimize.gr/public_html/wp-content/plugins/elemen in /home/customer/www/optimize.gr/public_html/wp-content/plugins/pixerex-elements/widgets/pr-logo.php on line 166