The value for “webpart context configureStart” must not be undefined

Question

Getting following error in after adding webpart. I can add it workbench.html but in workbench.aspx it's not working.

The value for "webpart context configureStart" must not be undefined

It's happening in all samples from sp-dev-fx-webparts. It's also happening in fresh installation

Answer 1

So apparently we messed up in the shift away from @microsoft/sp-client-preview towards @microsoft/sp-webpart-base . While we fix up documentation, samples, yeoman, etc. please follow the instructions in the "New BaseClientSideWebPart package location" section of this page - https://github.com/SharePoint/sp-dev-docs/wiki/Release-Notes-Drop-5