Event name should have at least 3 parts separated by slash

Error:

Error in Visual Studio when trying to publish project.

Event name should have at least 3 parts separated by slash 

Fix:

This specific error happens when you are not logged in to the Azure account in VS (the account that contains the Function app).

To work-around this issue:

1. You can go to File -> Account Settings
2. Under All Accounts -> Click Add
3. Login with your Azure account
4. Publish should succeed.

Sources:

https://developercommunity2.visualstudio.com/t/Event-name-should-have-at-least-3-parts-/1255318