Sonar 7.3 compatibility

[egr-ext]

The upgrade to SonarQube 7.3 gives the following crash :

+1: 2018.08.14 14:51:01 ERROR web[][o.s.s.p.Platform] Background initialization failed. Stopping SonarQube
java.lang.IllegalStateException: Fail to load plugin ObjectiveC (Backelite) [backelitesonarobjectivecplugin]
at org.sonar.server.plugins.ServerExtensionInstaller.installExtensions(ServerExtensionInstaller.java:82)
at org.sonar.server.platform.platformlevel.PlatformLevel4.start(PlatformLevel4.java:586)
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.lang.Thread.run(Thread.java:748)

How to make it compatible ?