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Migration Error/Stuck on Field Groups, with warning: Undefined array key "id"

Support › MB ACF Migration › Migration Error/Stuck on Field Groups, with warning: Undefined array key "id"

Viewing 6 posts - 1 through 6 (of 6 total)
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  • November 30, 2025 at 8:04 PM #49439
    Michael WinandityaMichael Winanditya
    Participant

    When I tried to migrate to Metabox, it stop on migrating field groups. When I check the console, there is an error (see image)
    https://share.cleanshot.com/lM0GshKWCkr4C1G4p0Zf

    When I open a same page in new tab, a new error appeared on the top that says:
    Warning: Undefined array key "id" in /app/public/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/Register.php on line 30

    How to fix this? Currently I'm using local site to try the migration.

    Thank you.

    December 1, 2025 at 11:01 PM #49443
    PeterPeter
    Moderator

    Hello Michael,

    Thanks for reaching out.

    Do you see the folder mb-json in your theme/child theme folder? If so, please try to delete it and continue migrating data to Meta Box again.

    Let me know how it goes.

    December 3, 2025 at 8:42 AM #49467
    Michael WinandityaMichael Winanditya
    Participant

    Hi Peter.

    I don't see mb-json folder inside my theme or child theme.

    December 3, 2025 at 10:51 PM #49472
    PeterPeter
    Moderator

    Hello,

    Please share your site admin account by submitting this contact form https://metabox.io/contact/
    I will take a look.

    Thank you.

    December 3, 2025 at 11:58 PM #49477
    Michael WinandityaMichael Winanditya
    Participant

    Hello, like I said before, I'm using local environment for the site (Local WP). The only possible thing for you to access the site is if we set the date and time so you able to see the site using live link. Aside from that, I can record video or supply any data you want.

    I do have a live site, but still using ACF instead of Metabox. That's why I want to test it locally before migrating the live site. I also can't spin up a staging site because the limitation of my hosting server.

    December 4, 2025 at 8:39 PM #49482
    PeterPeter
    Moderator

    Hello,

    You can take a full backup of your site or database with a third-party plugin like Duplicator, All In One WP Migration then share the backup file with me by submitting this contact form https://metabox.io/contact/
    I will check the issue on my site.

    Thanks.

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