Error in execution of monitored action GetSessionDataAction (execution id: 158205345-0, execution type: CLIENT)

Hi, I get this error every time I run the server. Error in execution of monitored action 'GetSessionDataAction' (execution id: 1582866605345-0, execution type: CLIENT) This shows up sometimes during running the server. There are no error on the application side though. Any help!
1 answers

I see a discussion on the topic here, but no real solution.

Did it start after a Mendix upgrade? In that case an upgrade of all appstore modules to the latest version and cleanup of userlib may help.