after upgrading ePO to version 4.6.6 i cannot see the additional section under the clients task and for that i cannot modify or create a new task anymore .
If anyone has any idea why this happens and how to resolve it please let me know.
Thank you in advance
That does not seem to bode well for the success of the 4.6.6 upgrade tbh.
You may try checking in the current McAfee Agent extension if you are not already using the latest.
The upgrade may refresh the missing file(s).
Otherwise you will probably need to open a support case for advice.