TypeError: Cannot read property 'prototype' of undefined about formio-app-basic

[randallknutson]

If you delete the /gulp/e2e-test.js and /gulp/unit-tests.js it will work again. The issue is that karma has deprecated the version in these projects which breaks legacy tests. We aren't using them anyway so they can be removed.

[pavelm]

+1 I'm seeing the same thing.

[cegithub]

I am getting same issue.Is there any solution for this error?

[hari0206]

getting this even after adding 'gulp-sass' after removing /gulp/e2e-test.js and /gulp/unit-tests.js
what should I do
Starting 'styles'...
[11:44:45] 'styles' errored after 96 ms
[11:44:45] Error: Cannot find module 'gulp-sass'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
at Function.Module._load (internal/modules/cjs/loader.js:562:25)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at requireFn (E:\formio-app-basic-master2311\node_modules\gulp-load-plugins\index.js:40:16)
at Object.get (E:\formio-app-basic-master2311\node_modules\gulp-load-plugins\index.js:65:18)
at Gulp. (E:\formio-app-basic-master2311\gulp\styles.js:41:13)
at module.exports (E:\formio-app-basic-master2311\node_modules\orchestrator\lib\runTask.js:34:7)
at Gulp.Orchestrator._runTask (E:\formio-app-basic-master2311\node_modules\orchestrator\index.js:273:3)
at Gulp.Orchestrator._runStep (E:\formio-app-basic-master2311\node_modules\orchestrator\index.js:214:10)
[11:44:45] gulp-inject Nothing to inject into index.scss.
[11:44:45] all files 7.08 kB
[11:44:45] Finished 'scripts' after 684 ms