Hi,
My SQL Developer version is 18.1.0.095.
My DB version is 11.1.0.6.0
Connected as sysdba, when I go to "Tools->Monitor Sessions" then clicking on the "Contention" tab I get the following error:

Seems that the underlying query according to the Statements Log is using the v$sqlcommand view which doesn't exist in 11.1.0.6.0.
Is this a known issue?
Thanks