Sonarqube scanner execution error - org.sonarqube.ws.client.HttpException: Error 500

Hello, We have an issue with the sonarqube scanner. Here are the details information on the error and server logs.
<<<

10:16:27.893 [INFO] [org.sonarqube.gradle.SonarQubeTask] Load project repositories
10:16:27.943 [DEBUG] [org.sonarqube.gradle.SonarQubeTask] GET 500 http://<server>:9000/sonarqube/batch/project.protobuf?key=<projectkey> | time=50ms
10:16:27.956 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Completing Build operation 'Execute run for :sonarqube'
10:16:27.956 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Build operation 'Execute run for :sonarqube' completed
10:16:27.957 [DEBUG] [org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter] Removed task artifact state for {} from context.
10:16:27.957 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':sonarqube'
10:16:27.957 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Completing Build operation 'Task :sonarqube'
10:16:27.957 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Build operation 'Task :sonarqube' completed
10:16:27.957 [INFO] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] :sonarqube (Thread[Task worker for ':' Thread 2,5,main]) completed. Took 5.536 secs.
10:16:27.958 [DEBUG] [org.gradle.internal.resources.AbstractTrackedResourceLock] Task worker for ':' Thread 2: released lock on :
10:16:27.958 [DEBUG] [org.gradle.internal.work.DefaultWorkerLeaseService] Worker lease root.1.22 completed (1 worker(s) in use)
10:16:27.958 [DEBUG] [org.gradle.internal.resources.AbstractTrackedResourceLock] Task worker for ':' Thread 2: released lock on root.1.22
10:16:27.958 [DEBUG] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] Task worker [Thread[Task worker for ':' Thread 2,5,main]] finished, busy: 43.663 secs, idle: 0.35 secs
10:16:27.963 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Completing Build operation 'Run tasks'
10:16:27.963 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Build operation 'Run tasks' completed
10:16:27.989 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
10:16:27.989 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
10:16:27.990 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
10:16:27.990 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
10:16:27.990 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task ':sonarqube'.
10:16:27.990 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > org.sonarqube.ws.client.HttpException: Error 500 on http://<server>:9000/sonarqube/batch/project.protobuf?key=<projectkey>: {"errors":[{"msg":"An error has occurred. Please contact your administrator"}]}
10:16:27.990 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
10:16:27.991 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Try:
10:16:27.991 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.  Run with --scan to get full insights.
10:16:27.991 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
10:16:27.991 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Get more help at https://help.gradle.org
10:16:27.992 [WARN] [org.gradle.internal.featurelifecycle.LoggingDeprecatedFeatureHandler]
Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.
See https://docs.gradle.org/4.8/userguide/command_line_interface.html#sec:command_line_warnings
10:16:27.992 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger]
10:16:27.992 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED in 57s

Server logs -

2021.04.19 10:22:41 ERROR web[AXjnbvmjDDAgbPTbAAdV][o.s.s.w.WebServiceEngine] Fail to process request http://<server>:9000/sonarqube/batch/project.protobuf?key=<projectkey>
java.lang.NullPointerException: null
        at com.google.protobuf.Internal.checkNotNull(Internal.java:64)
        at com.google.protobuf.MapField$MutatabilityAwareMap.putAll(MapField.java:338)
        at org.sonarqube.ws.Batch$WsProjectResponse$Builder.putAllFileDataByModuleAndPath(Batch.java:2244)
        at org.sonar.server.batch.ProjectAction.buildResponse(ProjectAction.java:108)
        at org.sonar.server.batch.ProjectAction.handle(ProjectAction.java:99)
        at org.sonar.server.ws.WebServiceEngine.execute(WebServiceEngine.java:110)
        at org.sonar.server.ws.WebServiceFilter.doFilter(WebServiceFilter.java:88)
        at org.sonar.server.platform.web.MasterServletFilter$GodFilterChain.doFilter(MasterServletFilter.java:126)
        at org.sonar.server.platform.web.MasterServletFilter.doFilter(MasterServletFilter.java:95)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.user.UserSessionFilter.doFilter(UserSessionFilter.java:87)
        at org.sonar.server.user.UserSessionFilter.doFilter(UserSessionFilter.java:71)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.platform.web.CacheControlFilter.doFilter(CacheControlFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.platform.web.SecurityServletFilter.doHttpFilter(SecurityServletFilter.java:76)
        at org.sonar.server.platform.web.SecurityServletFilter.doFilter(SecurityServletFilter.java:48)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.platform.web.RedirectFilter.doFilter(RedirectFilter.java:58)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.platform.web.requestid.RequestIdFilter.doFilter(RequestIdFilter.java:63)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.sonar.server.platform.web.RootFilter.doFilter(RootFilter.java:62)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
        at ch.qos.logback.access.tomcat.LogbackValve.invoke(LogbackValve.java:256)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:834)

Sonarqube version - 7.9.3

Is it a known issue? Could you help? Thank you