Uncaught TypeError: Cannot read property 'active' of undefined

[medied]

Similar to #397

Uncaught TypeError: Cannot read property 'active' of undefined
    at _validateEmail (validations.js:18)
    at Object.click #join (hero.js:53)
    at blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:3818
    at Function.Template._withTemplateInstanceFunc (blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:3769)
    at Blaze.View.<anonymous> (blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:3817)
    at blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:2617
    at Object.Blaze._withCurrentView (blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:2271)
    at Blaze._DOMRange.<anonymous> (blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:2616)
    at HTMLDivElement.<anonymous> (blaze.js?hash=adc5286b78e5c0f8e7f56a602f77eefb5def6bf1:863)
    at HTMLDivElement.dispatch (jquery.js?hash=4243d4a77640caf927d698e462964f41b6e712f8:5282)
    at HTMLDivElement.elemData.handle (jquery.js?hash=4243d4a77640caf927d698e462964f41b6e712f8:4934)
    at HTMLDivElement.wrapped (flowkey_raven.js?hash=99958eae7f750dae2c3b81cdcde643d33bc3ca06:574)