[Multiuser] Authorize an application on GitHub from the 'Import GiitHub' does not work

[artaleks9]

Description

• When I try to authorize an application on GitHub from the 'Import Project GitHub' form I have error notification and nothing more

Reproduction Steps:

• Open the IDE, go to the 'Workspace' in the Menu
• Select the 'Import Project' -> 'GitHub'
• Click the 'Load Repo'

Expected behavior:

• should be appeared web page with a login form to GitHub

Observed behavior:
there is message: 'Failed to authorize application on GitHub'

Che version: 6.0.0-M5
OS and version: Fedora 25
Che install: Docker/OCP (multiuser)

Additional information:

• Problem can be reliably reproduced, doesn't happen randomly: [Yes]
• See the attachment:
  

[ghost]

@artaleks9 I think adding steps on configuring GitHub oAuth are necessary too. Please, update the issue.

[mshaposhnik]

Fixed;