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Fatal Error on import custom fields

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  • September 11, 2025 at 2:28 PM #48967
    Ole PoetterOle Poetter
    Participant

    Hi,

    I would like to import a custom field set, but get a fatal error:

    Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /wp-content/plugins/meta-box-builder-ui/src/Import.php:97 Stack trace: #0 /wp-content/plugins/meta-box-builder-ui/src/Import.php(49): MBB\Import->import_json() #1 /wp-includes/class-wp-hook.php(324): MBB\Import->import() #2 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #3 /wp-includes/plugin.php(517): WP_Hook->do_action() #4 /wp-admin/admin.php(176): do_action() #5 /wp-admin/edit.php(10): require_once('...') #6 {main} thrown in /wp-content/plugins/meta-box-builder-ui/src/Import.php on line 97

    Kind regards,
    Ole

    September 11, 2025 at 8:50 PM #48971
    PeterPeter
    Moderator

    Hello Ole,

    Thanks for reaching out.

    What is the Meta Box Builder version on your site? Please update this plugin to the latest version 5.0.1 or use the plugin Meta Box AIO 3.0.1 and recheck the issue.

    If it doesn't help, please share the import file with me. I will try to import it to my demo site and investigate the issue.

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