Eber unknown routing error

i'm building a webapp at the moment and i'm a lil bit confused about an error that i get, cause i can't find any solution for it.

When i delete on my app a customer it should redirect the user automaticly back to the global customer page. This worked so far till yesterday, but now is it like that the the system will delete the customer, but it will not redirect the user to the global customer page and i get this error in the dev tools

[Error] Route error with code: Unknown
Error

__ember1494325682968: "ember2023"

code: undefined

description: undefined

fileName: undefined

lineNumber: undefined

message: "Attempted to handle event `pushedData` on <model:30dd50c9-aea9-4b20-b4e2-915ee7dd9539> while in state root.deleted.inFlight. "

name: "Error"

number: undefined

stack: "t@http://ift.tt/2pfSPcr"

Error Prototyp
Keine Eigenschaften.

Error Prototyp

constructor: function()

arguments: TypeError: 'arguments', 'callee', and 'caller' cannot be accessed in this context.

caller: TypeError: 'arguments', 'callee', and 'caller' cannot be accessed in this context.

length: 1

name: "Error"

prototype: Error

stackTraceLimit: 50

Function Prototyp

message: ""

name: "Error"

toString()

Object Prototyp
    error
    error (kallax-c2b26e75f939cea22d9aed9cd83af4a0.js:8:5379)
    y (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:14:9088)
    d (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:23:8999)
    trigger (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:23:19499)
    (anonyme Funktion) (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:23:11463)
    O (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:24:545)
    E (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:24:631)
    w (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:24:448)
    b (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:23:31928)
    invokeWithOnError (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:8:2381)
    flush (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:8:2833)
    flush (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:8:3599)
    end (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:8:3944)
    run (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:8:5014)
    success (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:66:19101)
    l (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:6:14437)
    fireWith (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:6:15199)
    r (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:7:18816)
    (anonyme Funktion) (vendor-7911d946a65b6ccd9d60e56c16e6f8d2.js:7:23690)
    d (raven.min.js:2:6553)

By the way, it works local. I have this problems only online with real servers.