[wp-trac] [WordPress Trac] #51158: With ACF Blocks in 5.5, "enqueue_assets" causes fatal error

[WordPress Trac]

#51158: With ACF Blocks in 5.5, "enqueue_assets" causes fatal error
---------------------------+-------------------------------------
 Reporter:  bronsonoquinn  |      Owner:  (none)
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Editor         |    Version:  5.5
 Severity:  blocker        |   Keywords:  2nd-opinion needs-patch
  Focuses:                 |
---------------------------+-------------------------------------
 This is related to ACF Pro, but didn't happen until the upgrade to WP 5.5.
 I downgraded to 5.4.2 to make sure and I can verify it's a WordPress
 issue, likely related to REACT or the Rest API. I don't know enough about
 the Gutenberg editor to know if it's specific to that, so I'm posting here
 with "second-opinion" Workflow Keyword.

 I have several custom blocks created using ACF Pro. One of them requires
 multiple javascript files and uses the "enqueue_assets" attribute to
 enqueue them.

 When I try to edit any post, I get a popup error that covers the entire
 screen saying "The editor has encountered an unexpected error." and has 3
 buttons: "Attempt Recovery", "Copy Post Text", "Copy Error". None of the
 buttons work.

 In the console, I get these errors:

 }}}
 react-dom.min.js?ver=16.9.0:103
 TypeError: First argument must be a String, HTMLElement, HTMLCollection,
 or NodeList
     at t.exports (compose.min.js?ver=c4775e2aa9288586791e26a980eff851:9)
     at e.value (compose.min.js?ver=c4775e2aa9288586791e26a980eff851:9)
     at new e (compose.min.js?ver=c4775e2aa9288586791e26a980eff851:9)
     at compose.min.js?ver=c4775e2aa9288586791e26a980eff851:9
     at Vb (react-dom.min.js?ver=16.9.0:104)
     at Xi (react-dom.min.js?ver=16.9.0:151)
     at unstable_runWithPriority (react.min.js?ver=16.9.0:26)
     at Ma (react-dom.min.js?ver=16.9.0:52)
     at Yb (react-dom.min.js?ver=16.9.0:150)
     at O (react-dom.min.js?ver=16.9.0:120)

 components-1480.js:24
 Uncaught TypeError: Cannot read property 'clientHeight' of null
     at G.hasOverflowedContent (components-1480.js:24)
     at G.fitTitle (components-1480.js:24)
     at components-1480.js:24
 }}}

 After the second error, the first error repeats and keeps getting hit
 every few milliseconds, telling me it has thousands of times within a
 minute.

 I'll post this with ACF Pro, too, but wanted to mention here in case it's
 a WordPress bug. I don't know how many people use ACF blocks in the Block
 Editor, but it completely prevents people from editing posts if they have
 some.

 Thanks!

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Ticket URL: <https://core.trac.wordpress.org/ticket/51158>
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