Error rendering template: app.html:31 A template tag of type BLOCKOPEN is not allowed here.

[deanrad]

In Meteor 0.8 with its new templating engine allowing for finer-grained updates, some syntax has been deprectated per here: https://github.com/superstringsoftware/observatory-apollo/issues/3

app.html:31: Reactive HTML attributes must either have a constant name or consist of a single {{helper}} providing a dictionary of names and values.  A template tag of type BLOCKOPEN is not allowed here.