New Discussion button not work

[ronnyDevelop]

New discussion button does not do anything, I am using chatter in an already done application, the migration of the bd was added to the previous user's migration.

[irfanullahshakir]

I also have this problem ...

[mtrajano]

I was also facing the same issue, this is most likely being caused by the defer in the script tag for app.js where jQuery is being included. If you remove the defer it should work