Fatal error: Uncaught TypeError: core\router::guess_basepath(): Return value must be of type string, null returned in /var/lms/moodle/lib/classes/router.php:115 Stack trace: #0 /var/lms/moodle/lib/classes/router.php(79): core\router->guess_basepath() #1 /var/lms/moodle/lib/php-di/php-di/src/Definition/Resolver/ObjectCreator.php(129): core\router->__construct(Object(core\router\response_handler), Object(core\router\route_loader), Object(core\router\request_validator), Object(core\router\response_validator), NULL) #2 /var/lms/moodle/lib/php-di/php-di/src/Definition/Resolver/ObjectCreator.php(56): DI\Definition\Resolver\ObjectCreator->createInstance(Object(DI\Definition\ObjectDefinition), Array) #3 /var/lms/moodle/lib/php-di/php-di/src/Definition/Resolver/ResolverDispatcher.php(60): DI\Definition\Resolver\ObjectCreator->resolve(Object(DI\Definition\ObjectDefinition), Array) #4 /var/lms/moodle/lib/php-di/php-di/src/Container.php(353): DI\Definition\Resolver\ResolverDispatcher->resolve(Object(DI\Definition\ObjectDefinition), Array) #5 /var/lms/moodle/lib/php-di/php-di/src/Container.php(136): DI\Container->resolveDefinition(Object(DI\Definition\ObjectDefinition)) #6 /var/lms/moodle/lib/php-di/php-di/src/CompiledContainer.php(65): DI\Container->get('core\\router') #7 /var/lms/moodle/lib/classes/di.php(62): DI\CompiledContainer->get('core\\router') #8 /var/lms/moodle/r.php(54): core\di::get('core\\router') #9 {main} thrown in /var/lms/moodle/lib/classes/router.php on line 115