Gulp --demo1 error

Hello,

I am getting the bellow error when I try to build the demo1 theme. Please help. Thank you.

C:\recruiter-ai\ui\tools>gulp --demo1
Error: Not supported
at eval (eval at (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\lib\shared\require-or-import.js:10:15), :1:1)
at requireOrImport (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\lib\shared\require-or-import.js:24:7)
at execute (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\lib\versioned\^4.0.0\index.js:37:3)
at Liftoff.handleArguments (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\index.js:211:24)
at Liftoff.execute (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\liftoff\index.js:201:12)
at module.exports (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\flagged-respawn\index.js:51:3)
at Liftoff. (C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\liftoff\index.js:191:5)
at C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\liftoff\index.js:149:9
at C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\v8flags\index.js:162:14
at C:\Users\marko\AppData\Roaming\npm\node_modules\gulp-cli\node_modules\v8flags\index.js:41:14