Error is throwing away "node.js is not installed" . (But node.js was installed before)

Error is throwing away "node.js is not installed’’ while clicking on ‘Start’ on ‘Spy Mobile’ window. The same as on trying to open ‘Spy Mobile’ window. But node.js

was installed before by yours instactions.
https://docs.katalon.com/display/KD/Mobile+on+Windows
( os = windows 7)