[wp-trac] [WordPress Trac] #39496: Can't view page preview.

[WordPress Trac]

#39496: Can't view page preview.
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 Reporter:  davidmlentz   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.7
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Clicking any Edit link on the list of published pages (wp-
 admin/edit.php?post_status=publish&post_type=page), and then clicking the
 Preview Changes button on the edit page, I'm unable to preview the page.
 Instead I'm presented with the error message "Sorry, you are not allowed
 to preview drafts."

 Expected result: Clicking the Preview Changes button shows me the page,
 including the WP Admin bar.
 Actual result: Clicking the Preview Changes button shows me the error
 message "Sorry, you are not allowed to preview drafts."

 Problem occurs when we use WP Core 4.7. Problem does not occur on WP Core
 4.6.

 Problem occurs when all plugins are deactivated and uninstalled.

 Problem occurs on more than one theme.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39496>
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