Custom Fields
Support Meta Box Builder Classloading problem: Error on save of custom type

  • Creator
  • #16256
    Resolved Texo

    Hi, I get this issue when I save a custom post type that is associated with a field group.
    The field group is displayed no problem when I edit the custom post, but then when I want to save, this is the error message, it seems to be a classloader issue:
    PHP Fatal error: Uncaught Error: Class 'MBB\Attribute' not found in /Users/xxxxxx/Documents/src/xxxx.xx/wp-content/plugins/meta-box-builder/bootstrap.php on line 16
    Is this a known issue? what to do?

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  • Author
  • #16258
    Anh Tran

    Hi Texo,

    I've just tested again and couldn't see the problem. Please see my video:

    Can you try re-install the Meta Box Builder plugin again to make sure files are all available?

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