Unable to start sonarqube 7.9 using the latest exxeta plugon

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Team , we are unable to start the sonarqube7.9 post message flow plugin placement in folder.However esql plugin is working fine:
Error:
java.lang.IllegalStateException: Fail to load plugin Msgflow [msgflow]
at org.sonar.server.plugins.ServerExtensionInstaller.installExtensions(ServerExtensionInstaller.java:82)
at org.sonar.server.platform.platformlevel.PlatformLevel4.start(PlatformLevel4.java:543)
at org.sonar.server.platform.Platform.start(Platform.java:211)
at org.sonar.server.platform.Platform.startLevel34Containers(Platform.java:185)
at org.sonar.server.platform.Platform.access$500(Platform.java:46)
at org.sonar.server.platform.Platform$1.lambda$doRun$0(Platform.java:119)
at org.sonar.server.platform.Platform$AutoStarterRunnable.runIfNotAborted(Platform.java:371)
at org.sonar.server.platform.Platform$1.doRun(Platform.java:119)
at org.sonar.server.platform.Platform$AutoStarterRunnable.run(Platform.java:355)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NoClassDefFoundError: org/sonar/api/batch/Sensor
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)
at org.sonar.classloader.ClassRealm.loadClassFromSelf(ClassRealm.java:125)
at org.sonar.classloader.ParentFirstStrategy.loadClass(ParentFirstStrategy.java:37)
at org.sonar.classloader.ClassRealm.loadClass(ClassRealm.java:87)
at org.sonar.classloader.ClassRealm.loadClass(ClassRealm.java:76)
at com.exxeta.iss.sonar.msgflow.MessageFlowPlugin.getExtensions(MessageFlowPlugin.java:96)
at com.exxeta.iss.sonar.msgflow.MessageFlowPlugin.define(MessageFlowPlugin.java:87)
at org.sonar.server.plugins.ServerExtensionInstaller.installExtensions(ServerExtensionInstaller.java:72)
... 9 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.sonar.api.batch.Sensor
at org.sonar.classloader.ParentFirstStrategy.loadClass(ParentFirstStrategy.java:39)
at org.sonar.classloader.ClassRealm.loadClass(ClassRealm.java:87)
at org.sonar.classloader.ClassRealm.loadClass(ClassRealm.java:76)
... 24 common frames omitted
2021.09.28 15:02:26 INFO web[][o.s.p.ProcessEntryPoint] Hard stopping process
2021.09.28 15:02:26 INFO web[][o.s.s.p.d.EmbeddedDatabase] Embedded database stopped

Built plugins in java8.

Urgent fix required please.