OK, something went really wrong with the installation!
"dependencies": {
"body-parser": "^1.19.0",
"express-validator": "^6.8.0",
"fs-extra": "^9.0.1",
"jsonwebtoken": "^8.5.1",
"serve-index": "^1.9.1",
"serve-static": "^1.14.1",
"socket.io": "^2.3.0"
},
As you can see, fs-extra is a dependency and should have been installed when uibuilder was installed.
Can you check to see if there is an npm error log in the C:\Users\auraynar\.node-red folder?
While you are in that folder at the command line, I would stop Node-RED, run npm remove node-red-contrib-uibuilder then, assuming no errors are generated, run npm install node-red-contrib-uibuilder and check for errors. If it is OK (some warnings are generated but there shouldn't be any errors), restart Node-RED and try again.
Needless to say that this doesn't normally happen and I've never seen it before. If the npm stats are to be believed, uibuilder gets over a thousand installs/updates a month.
