Failed to compile

[Komlavi77]

I'm really new at using ionic, I have courses on ionic 3 but the version now is ionic 5, so I'm trying to create an app, while compiling it, that is what I'm having as an error message, please can someone helps me to understand and solve the issue. I do not know where to look.

C:\Users\dkme7\MyApp>ionic serve

ng.cmd run app:serve --host=localhost --port=8100
[ng] i ｢wds｣: Project is running at http://localhost:8100/webpack-dev-server/
[ng] i ｢wds｣: webpack output is served from /
[ng] i ｢wds｣: 404s will fallback to //index.html
[ng] chunk {main} main.js, main.js.map (main) 1.98 kB [initial] [rendered]
[ng] chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 154 kB [initial] [rendered]
[ng] chunk {runtime} runtime.js, runtime.js.map (runtime) 6.15 kB [entry] [rendered]
[ng] chunk {styles} styles.js, styles.js.map (styles) 114 kB [initial] [rendered]
[ng] chunk {vendor} vendor.js, vendor.js.map (vendor) 340 kB [initial] [rendered]
[ng]
[ng] ERROR in Cannot read property 'members' of undefined
[ng] Date: 2020-03-23T15:43:44.393Z - Hash: cf72204ddc8bef95dd48 - Time: 4233ms

[INFO] Development server running!

   Local: http://localhost:8100

   Use Ctrl+C to quit this process

[INFO] Browser window opened to http://localhost:8100!

[ng] i ｢wdm｣: Failed to compile.