[wp-trac] [WordPress Trac] #41940: Problems with the visual editor in Wordpress 4.8.*

[WordPress Trac]

#41940: Problems with the visual editor in Wordpress 4.8.*
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 Reporter:  pascaltraumueller   |      Owner:
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  Posts, Post Types   |    Version:  4.8
 Severity:  normal              |   Keywords:
  Focuses:  ui, administration  |
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 Hello everyone,

 I've recently upgrade my wordpress version from version 4.7.5 to 4.8.
 After this upgrade every user of my website who is using Internet Explorer
 11(which is our companies default browser) isn't able to open the visual
 editor tab in the backend anymore. We don't even have the option to select
 the visual editor like you can see in this screenshot of the backend
 editor:[[Image(https://imgur.com/xUkkQ0G)]].
 This problem also occures after I've disabled all plugins and selected the
 standard theme, it even appears when I'm using a fresh wordpress
 installation.
 I've tried the following Versions: 4.8, 4.8.1, 4.8.2, but all this version
 have this problem. When I downgrade to Version 4.7.6 or below there is no
 problem with the editor. When we use Firefox or Chrome we can select the
 Visual Editor without any problems.

 The Website is running on an IIS Webserver (Version 8.5.9600.16384). The
 Operating System on this Server is Windows Server 2012 R2.

 If you have any questions, feel free to ask.
 Kind regards,

 Pascal

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Ticket URL: <https://core.trac.wordpress.org/ticket/41940>
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