Imported flows/

A suggestion from https://discourse.nodered.org/t/cannot-interact-with-any-buttons-on-nodes-timestamps-debug-nodes-cannot-see-values-and-trigger-times-of-nodes/76021
In a terminal window

cd ~/.node-red
npm update

Can you also share the version of Node-red you have (at the bottom of the hamburger menu) and Node.js version (npm -v)