Fatal error: Uncaught Error: Undefined class constant 'RELEASE_STATUS_RC' in /strona/wp-content/plugins/elementor-beta/modules/developer-edition/experiments.php:35 Stack trace: #0 /strona/wp-content/plugins/elementor-beta/modules/developer-edition/experiments.php(18): ElementorBeta\Modules\DeveloperEdition\Experiments->is_beta_release_or_higher(Array) #1 /strona/wp-content/plugins/elementor-beta/modules/developer-edition/experiments.php(47): ElementorBeta\Modules\DeveloperEdition\Experiments->enable_experiments(Object(Elementor\Core\Experiments\Manager), Array) #2 /strona/wp-includes/class-wp-hook.php(324): ElementorBeta\Modules\DeveloperEdition\Experiments->ElementorBeta\Modules\DeveloperEdition\{closure}(Object(Elementor\Core\Experiments\Manager), Array) #3 /strona/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #4 /strona/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /strona/wp-content/plugins/elementor/core/experiments/manager.php(115): do_action('elementor/exper...', Object(Elementor in /strona/wp-content/plugins/elementor-beta/modules/developer-edition/experiments.php on line 35