Built-in cursor monitor doesn't work

[vsvistunou]

Hi! I'm running Timebase server using the image finos/timebase-ce-server:6.1. When I'm trying to open buit-in cursor monitoring (available at http://TIMEBASE_SERVER:8011/tb/cursors) at the moment, when I have some active cursors, it crashes. Otherwise, it works fine.

The way to reproduce:

1. Open Timebase web and start monitoring of any stream
2. Go to the page http://TIMEBASE_SERVER:8011/tb/cursors
3. A stack trace will be shown: