[wp-trac] [WordPress Trac] #51592: Customizer: Create New Menu is Empty

[WordPress Trac]

#51592: Customizer: Create New Menu is Empty
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 Reporter:  boldgrid      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Customize     |    Version:  trunk
 Severity:  blocker       |   Keywords:
  Focuses:                |
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 When attempting to create new menus in the WordPress Customizer, the
 Create New Menu panel is empty. I am not getting any console errors or php
 errors.
 Steps to Replicate:

 1. Install clean wordpress with latest stable version.
 2. Install beta tester plugin.
 3. Set to bleeding edge nightlies
 4. Dashboard > Updates > update core ( this installed build
 5.6-beta1-49262  for me )
 5. Go to Appearence > Customize
 6. Go to Menus > Create New Menu

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Ticket URL: <https://core.trac.wordpress.org/ticket/51592>
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