Our head office gave us the following temporary solution:
1. Click on "Optimize system resources". You will find it in the ibaDatCoordinator server status.
2. Stop the service and look for the following file: C:\programmes (x86)\iba\ibaDatCoordinator\lastsaved.xml
Look for the entry <MaxSimultaneousIbaAnalyzers> (which is near the end). The numerical value for this node is probably "0" --> Please enter for example a "5", save and then restart the service.