Errors when trying to create account

[georgearchon]

Hello. I wanted to try your app but it appears your UI for users to register is broken. I tried with both chromium and firefox. Below are the error messages.
Console errors for chromium:

Angular is running in the development mode. Call enableProdMode() to enable the production mode.
imusify-prod.herokuapp.com/v1/auth-token/:1 Failed to load resource: the server responded with a status of 400 (Bad Request)
imusify-prod.herokuapp.com/v1/users/:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
SignupComponent.html:20 ERROR Error: Cannot find a differ supporting object 'Internal Server error' of type 'string'. NgFor only supports binding to Iterables such as Arrays.
    at NgForOf.webpackJsonp.../../../common/@angular/common.es5.js.NgForOf.ngOnChanges (common.es5.js:1681)
    at checkAndUpdateDirectiveInline (core.es5.js:10840)
    at checkAndUpdateNodeInline (core.es5.js:12341)
    at checkAndUpdateNode (core.es5.js:12284)
    at debugCheckAndUpdateNode (core.es5.js:13141)
    at debugCheckDirectivesFn (core.es5.js:13082)
    at Object.eval [as updateDirectives] (SignupComponent.html:20)
    at Object.debugUpdateDirectives [as updateDirectives] (core.es5.js:13067)
    at checkAndUpdateView (core.es5.js:12251)
    at callViewAction (core.es5.js:12599)

Similar errors occurred with firefox.