We saw this week that our build and deploy process for SharePoint Framework was breaking. We tracked it down to a change in the Office 365 CLI which was released recently.
Our previous step of logging into O365 so that we can deploy out package looked like this
#o365 spo login https://blahblah.sharepoint.com
The breaking change to the CLI was that they simplified the login process (makes sense)
And now the command works without the spo precursor
#o365 login https://blahblah.sharepoint.com