Fatal error: Out of memory (allocated 8388608) (tried to allocate 28672 bytes) in C:\Moodle31\server\moodle\lib\classes\session\manager.php on line 57

Fatal error: Uncaught Error: Class 'core\session\manager' not found in C:\Moodle31\server\moodle\lib\classes\shutdown_manager.php:103 Stack trace: #0 [internal function]: core_shutdown_manager::shutdown_handler() #1 {main} thrown in C:\Moodle31\server\moodle\lib\classes\shutdown_manager.php on line 103