Trouble creating logic action

I have created several successful logic actions in the past but today am unable to do so. When I click the Logic Action button, I am given a list of my current logic actions and a pull down button labeled “Select New Action”. When I click that button, I am given the choice to select “Select New Action” or the last condition that I created a logic action for. When I click the blue “Select New Action”, nothing happens. I expect it to show me a list of conditions for which I could create a logic action but it doesn’t do so?
I am using PLEG version 8.11, UI7 with Chrome. I also tried MS Edge but still had the same problem.