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Fatal error: Uncaught TypeError: Core::redirect(): Argument #1 ($url) must be of type string, null given, called in /var/www/php_educationplatform_server/src/site/vendor/festi-team/festi-framework-core/src/Response.php on line 428 and defined in /var/www/php_educationplatform_server/src/site/vendor/festi-team/festi-framework-core/src/Core.php:737 Stack trace: #0 /var/www/php_educationplatform_server/src/site/vendor/festi-team/festi-framework-core/src/Response.php(428): Core->redirect(NULL, false) #1 /var/www/php_educationplatform_server/src/site/vendor/festi-team/festi-framework-core/src/Response.php(309): Response->_processing(Object(MainPlugin), Array) #2 /var/www/php_educationplatform_server/src/dashboard/plugins/Jimbo/JimboPlugin.php(242): Response->send() #3 /var/www/php_educationplatform_server/src/dashboard/plugins/Jimbo/JimboPlugin.php(145): JimboPlugin->doPluginRequest(Array, Array, Array, Object(Response)) #4 /var/www/php_educationplatform_server/src/site/index.php(47): JimboPlugin->bindRequest(Array) #5 {main} thrown in /var/www/php_educationplatform_server/src/site/vendor/festi-team/festi-framework-core/src/Core.php on line 737