Copy Function Timeouts Without Updating System Clipboard

Thanks for the suggestion. I am on Mojave (10.14.6), so I followed the instructions on the help page you referenced:

  • quit both Keyboard Maestro and Keyboard Maestro Engine
  • open System Preferences > Security & Privacy > Privacy pane
  • select Accessibility
  • delete entries for both Keyboard Maestro and Keyboard Maestro Engine
  • launch KM and ensure that the Accessibility for both KM and KME are ticked

security-accessibilty

Alas, the problem remains: the Copy action results in a timeout, when accessed anywhere (Finder, Stickies, TextEdit, etc.).

However, the Paste action works as expected.