@sdetweil said in updating MMM-mmpm using mmpm web UI and now MagicMirror won't start: @travishardiman said in updating MMM-mmpm using mmpm web UI and now MagicMirror won't start: home/pi/MagicMirror/node_modules/systeminformation/lib/index.js this library is missing systeminformation cd ~/MagicMirror npm install systeminformation Thanks! That fixed it!!