[wp-trac] [WordPress Trac] #59553: In Beta 6.4-beta2, when trying to add a row or container, I get the error

[WordPress Trac]

#59553: In Beta 6.4-beta2, when trying to add a row or container, I get the error
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 Reporter:  texasfixer    |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Editor        |     Version:  trunk
 Severity:  critical      |  Resolution:
 Keywords:                |     Focuses:
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Comment (by hellofromTonya):

 Hello @texasfixer,

 Welcome to WordPress Core's Trac :) Thank you for opening this ticket.

 >This block has encountered an error and cannot be previewed.

 This issue likely needs to be investigated and resolved in the
 [https://github.com/WordPress/gutenberg/issues Gutenberg repository].

 Pinging the 6.4 Editor Triage / Tech Leads for awareness and guidance
 @annezazu @bph @karmatosed @siobhyb @mikachan

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Ticket URL: <https://core.trac.wordpress.org/ticket/59553#comment:3>
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