Unable to add additional device into existing action

I am having problems adding a device in one of my actions. I just added a Harmony Hub and wanted to use it to turn on the tv in the morning. Figured out logic and tested it yesterday. But when integrating it into MorningLightsOn it will not add a fifth device. The device is a child device from the Harmony Hub plugin. I even tried to add an additional light device and it will not take it either. It appears to save but when I go back to edit the action, the device is not there.

Is there a limit on the number of devices used in PLEG?

PLC 8.21 PLEG 8.11 firmware 1.7.3500

Update: It appears all three of my PLEGs are doing the same thing. Do I need to delete PLEG/PLC apps and start over?

Second update: From another post in this forum, I thought it might be the firmware so I asked Vera Customer Care to revert my firmware to the last version prior to the current. Didn’t help with this problem. Any ideas? Anyone?