I did the first part of the Sharepoint Framework tutorial. Everything was good until the last step. At the end of this topic, we have to access to the SharePoint hosted workbench. When I tried, I arrived on a page with this error message:

"Sorry, something went wrong An unexpected error has occurred."

Do I have to configure something to access to it? Do you have a solution to avoid this error?

  • I have got a strong hunch the issue comes from the tenant you have used. The tenant must be created as "Office 365 Developer". See also this.
    – moe
    Commented Jun 19, 2017 at 12:26
  • I've used it with a production tenant but the site needs to be created with the developer template.
    – Greg W
    Commented Jun 19, 2017 at 12:38
  • @moe this is currently true for SPFx Extensions only. Client Web-Part development can be done in a regular tenant. Commented Jun 19, 2017 at 13:13
  • @theChrisKent I can't say anything from my own experience, but by referring to the link I provided in the comment, it's documented that one should create exactly a Office 365 Developer before moving on to creating the client-side WPs.
    – moe
    Commented Jun 19, 2017 at 13:18
  • My web application has well a Developer site template. I don't know if itis what you want to know ? My other problem is I can't upload web apps on my site, problem occurs with this error message : /n "There were errors when validating the App manifest." Commented Jun 19, 2017 at 13:21

1 Answer 1


You were right, the tenant must be created as Office 365 Developer.

To do this :

  • Create a trial account on Office 365

  • Sign in

  • Click on Admin > Right menu panel > Admin centers > Sharepoint

Here you will see default site collections you can use to access to your workbench and upload your webparts.

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