I've made aconfiguration change to an M340 Analog card and now when I try to build the following message appears, "Process aborted: this tool is not ready." What should I do?

FA199191

9/07/2020

Unity is prompting you to "Validate" the change. The "validate" check mark appears just below the top menu bar. 
There is a screen capture in the attached document which shows the "Validate" button.