Synchrony is not working after updating Confluence from 7.1.0 to 7.2.0

[DVTS]

Hi,

today i updated our testinstallation of confluence to v7.2.0 as described in https://confluence.atlassian.com/doc/upgrading-confluence-4578.html#.

After the update confluence worked normal, then i updated the production installation.

After Logging into Confluence as admin i got the following SQL exception, i deleted bandana_unique_key from the database and installed the update again. The key was not generated so i guess this is by design!?

Now the problem is, that we can't create new pages, the error message is "After loading the editor an error happend" at the top right when creating a new page.

The status of synchrony is "Error". After disabling Synchrony it can't be enabled anymore.

The atlassian-synchrony.log doesn't contain up to date log entries.

System variable JRE_HOME points to c:\Program Files\Atlassian\Confluence\jre

File version of c:\Program Files\Atlassian\Confluence\jre\bin\java.exe: 8.0.202.8

Here is what i found in the atlassian-confluence.log:

2019-12-30 08:55:56,643 ERROR [Long running task: EnableTask] [confluence.util.longrunning.ConfluenceAbstractLongRunningTask] run Long running task "EnableTask" failed to run.
-- url: /rest/synchrony-interop/enable | referer: https://dvts-wiki/admin/confluence-collaborative-editor-plugin/configure.action | traceId: 9e7a870b58984fec | userName: admin
java.lang.NoClassDefFoundError: Could not initialize class oshi.software.os.windows.WindowsOperatingSystem
at oshi.SystemInfo.getOperatingSystem(SystemInfo.java:97)
at com.atlassian.confluence.plugins.synchrony.bootstrap.DefaultSynchronyProcessManager.getConfluenceProcessId(DefaultSynchronyProcessManager.java:701)
at com.atlassian.confluence.plugins.synchrony.bootstrap.DefaultSynchronyProcessManager.setupEnvironment(DefaultSynchronyProcessManager.java:391)
at com.atlassian.confluence.plugins.synchrony.bootstrap.DefaultSynchronyProcessManager.trySetup(DefaultSynchronyProcessManager.java:709)
at com.atlassian.confluence.plugins.synchrony.bootstrap.DefaultSynchronyProcessManager.lambda$startProcess$1(DefaultSynchronyProcessManager.java:603)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

King regards

[DVTS]

Hi and a happy new year to everybody, does anybody know how to contact the atlassian support when nobody is answering in the community?