R710tci -
When iDRAC is in a failed state, System Services will report disabled during POST and you will not have access to CTRL-E iDRAC settings menu. Plus you will be prompted with the error message you stated above.
Can you power off the host, reset the iDRAC and once the iDRAC is back up, launch the iDRAC GUI and verify you can access the GUI with no issues. If this passes, power on the host and verify you have System Services and CTRL-E available.
If you see System Services still disabled but you have access to CTRL-E, go into CTRL-E and enable System Services, save and exit.
Thanks