[wp-trac] [WordPress Trac] #45253: "Unhandled promise rejection" in 5.0-RC2

[WordPress Trac]

#45253: "Unhandled promise rejection" in 5.0-RC2
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 Reporter:  jsmoriss                 |       Owner:  (none)
     Type:  defect (bug)             |      Status:  reopened
 Priority:  normal                   |   Milestone:  5.1.1
Component:  Editor                   |     Version:  5.0
 Severity:  major                    |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:  javascript
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Comment (by ryankienstra):

 **45253.diff Seems To Fix This**

 **Steps To Reproduce**
 1. Clone the WPSSO plugin, and checkout this commit:
 `git clone https://github.com/SurniaUlula/wpsso.git`
 `git checkout 50f78`
 2. Activate WPSSO
 3. Create a new post
 4. Click "Save Draft"
 5. Expected: the post saves
 6. Actual: as reported earlier, there's an 'Uncaught (in promise)' error
 in the JS console

 **With 45253.diff applied**
 When @Chouby's `45253.diff` is applied, there is no console error

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Ticket URL: <https://core.trac.wordpress.org/ticket/45253#comment:26>
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