Fatal error: Uncaught Error: Access to undeclared static property: Persian_Flatsome\Request::$api_url in /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/activator/libraries/Request.php:23 Stack trace: #0 /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/activator/libraries/Request.php(26): Persian_Flatsome\Request->send_request('validation-lice...', Array, true) #1 /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/activator/libraries/Request.php(37): Persian_Flatsome\Request->send_request('validation-lice...', Array) #2 /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/activator/activator.php(151): Persian_Flatsome\Request->isValid('2a2b9b2c-e0b7-4...') #3 /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/Main.php(96): Persian_Flatsome\Activator::is_active() #4 /home/modern/public_html/wp-includes/class-wp-hook.php(324): Persian_Flatsome\Main->load_text_domain('') #5 /home/modern/public_html/wp-includes/class-wp-hook.php( in /home/modern/public_html/wp-content/plugins/persian-flatsome/includes/activator/libraries/Request.php on line 23