SpringBoot GraphQL Kotlin Runtime error

error.log

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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.6.4)

2022-03-13 22:35:57.577  INFO 10698 --- [  restartedMain] c.s.d.DemoGraphQlApplicationKt           : Starting DemoGraphQlApplicationKt using Java 11.0.12 on Krishnan-MBP13.local with PID 10698 (/Users/krishnansriramrama/Projects/Springboot/java/DemoGraphQL/target/classes started by krishnansriramrama in /Users/krishnansriramrama/Projects/Springboot/java/DemoGraphQL)
2022-03-13 22:35:57.578  INFO 10698 --- [  restartedMain] c.s.d.DemoGraphQlApplicationKt           : No active profile set, falling back to 1 default profile: "default"
2022-03-13 22:35:57.651  INFO 10698 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2022-03-13 22:35:57.651  INFO 10698 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2022-03-13 22:35:59.035  INFO 10698 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-03-13 22:35:59.086  INFO 10698 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 42 ms. Found 1 JPA repository interfaces.
2022-03-13 22:35:59.655  INFO 10698 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-03-13 22:35:59.662  INFO 10698 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-03-13 22:35:59.662  INFO 10698 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.58]
2022-03-13 22:35:59.772  INFO 10698 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-03-13 22:35:59.773  INFO 10698 --- [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2121 ms
2022-03-13 22:35:59.993  INFO 10698 --- [  restartedMain] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-03-13 22:36:00.019  INFO 10698 --- [  restartedMain] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.5.Final
2022-03-13 22:36:00.094  INFO 10698 --- [  restartedMain] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-03-13 22:36:00.145  INFO 10698 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2022-03-13 22:36:00.221  INFO 10698 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2022-03-13 22:36:00.229  INFO 10698 --- [  restartedMain] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2022-03-13 22:36:00.505  INFO 10698 --- [  restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-03-13 22:36:00.509  INFO 10698 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'