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ACF block not working in preview mode or auto

  • Trying to edit blocks I get this error and insted of a wysiwyg editor I get an empty box. If I put the block in edit mode it displays normally though.
    The strange thing is that blocks in other parts of the website work normally.

    TypeError: invalid ‘instanceof’ operand jQuery
    acf-input.min.js:1:29222

    TypeError: window.EBWidgets is undefined
    load-scripts.php:5:5

    ACF version: 5.8.1
    Wordpress version: 5.2.2

  • The issue was with another block loading a conflicting script

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