Flex-layout: Module '"../node_modules/@angular/core/core"' has no exported member 'OpaqueToken'.

[amar-muratovic]

Dear all,

this is one of the errors that I have when I type in _ionic serve_ in CMD. I was trying a different kind of things to solve this but without success.

ERROR:
import { ModuleWithProviders, OpaqueToken } from '@angular/core';

ENVIROMENT:
Ionic Framework: 3.9.2
Ionic App Scripts: 3.1.8
Angular Core: 5.0.3
Angular Compiler CLI: 5.0.3
Node: 6.10.3
OS Platform: Windows 10
Navigator Platform: Win32
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

[CaerusKaru]

Duplicate of #494

[CaerusKaru]

Please review the linked issue for the solution. Again, this is a duplicate issue.

[amar-muratovic]

Okay @CaerusKaru but please I'm not stupid I'm just trying to get a solution. I was Googling for the solution but without success...

[CaerusKaru]

Your problem is that you have the RC.1 version installed, which is solved by following the steps specified for solution in the linked issue. You need to install the @latest version, and make sure not to run npm update on the package.

[iftikharkhan89]

I solved this by replacing

OpaqueToken

with

InjectionToken

import { InjectionToken } from '@angular/core';

My Environment settings are
Angular CLI: 1.7.3
Node: 9.8.0
OS: darwin x64
Angular: 5.2.9

[KogAtlas]

Thanks @iftikharkhan89. This was _not_ a duplicate, at least not with the one that is linked.

[Mutondi]

Thanks, @iftikharkhan89 you are a lifesaver.

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