Now ionic lab doesn’t work anymore. Here is the message I get:

PS C:\Users\ouzin\chanel-pwa> ionic serve --lab

ng.cmd run app:serve --host=localhost --port=8100
[ng] Schema validation failed with the following errors:
[ng] Data path “.builders[‘app-shell’]” should have required property ‘class’.

[ERROR] ng has unexpectedly closed (exit code 1).

    The Ionic CLI will exit. Please check any output above for error details.