Gulp error why is browsersync not working?

Question

JavaScript

[16:26:31] AssertionError [ERR_ASSERTION]: Task never defined: sass
at getFunction (C:\Users\blood\Documents\David\Miller\node_modules\undertaker\lib\helpers\normalizeArgs.js:15:5)
at map (C:\Users\blood\Documents\David\Miller\node_modules\arr-map\index.js:20:14)
at normalizeArgs (C:\Users\blood\Documents\David\Miller\node_modules\undertaker\lib \helpers\normalizeArgs.js:22:10)
at Gulp.parallel (C:\Users\blood\Documents\David\Miller\node_modules\undertaker\lib\parallel.js:13:14)
at C:\Users\blood \Documents\David\Miller\gulpfile.js:67:43
at watch (C:\Users\blood\Documents\David\Miller\node_modules\undertaker\lib\set-task.js:13:15)
at bound (domain .js:419:14)
at runBound(domain.js:432:12)
at asyncRunner (C:\Users\blood\Documents\David\Miller\node_modules\async-done\index.js:55:18)
at processTicksAndRejections (internal/process/task_queues.js:75:11)
[16:26: 31] 'default' errored after 131 ms
[16:26:31] The following tasks did not complete: styles, scripts, browser-sync
[16:26:31] Did you forget to signal async completion?

Answer 1

Task never defined: sass

The task is missing + the following tasks need to be completed

styles, scripts, browser-sync

. But it would be better to see gulpfile.js

Answer 2

https://www.youtube.com/watch?v=PgFnfk0rbgk