My HelloWorld web part works fine in my localhost workbench. On my tenant workbench, I can add the web part but then I get the attached error instead of displaying it.
1 Answer
For funsies, I tried creating a new Developer site collection in my tenant - and the web part displays just fine in that workbench. This is contrary to what the current documentation says (see below).
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Created an issue for this: github.com/SharePoint/sp-dev-docs/issues/1245– TracyJan 16, 2018 at 23:24