Error adding blocks

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I can't edit blocks anymore! I regularly get an error when editing and adding blocks in Edge and Chrome. A couple of days ago the matter was operating normally. Very awkward :(
Core Version - 8.5.2

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wrongform
 
katalysis replied on at Permalink Reply
katalysis
Same thing happening on our sites.

There's discussion about this on Slack and a fix seem to be progress on github:

https://github.com/jquery-form/form/issues/571#issuecomment-63145107...