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Adding post type disappears if slug is longer than 20 characters

Support › MB Custom Post Type › Adding post type disappears if slug is longer than 20 characters

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  • February 23, 2026 at 9:33 PM #49763
    Dan StampsDan Stamps
    Participant

    I am trying to add a new post type, and when my slug reaches the 21st character the screen disappears and I don't see a gray screen with the wordpress menus. When this happens, I get a console error that says: ReferenceError: sprintf is not defined. Looks to be from post-type.js.

    February 24, 2026 at 6:50 PM #49769
    PeterPeter
    Moderator

    Hello Dan,

    Thanks for your feedback.

    This is a known issue and it has been fixed in this commit https://github.com/wpmetabox/mb-custom-post-type/commit/dc5867a6df73241492b629988873d98312015d6b
    It will be included in the next update of MB CPT plugin.

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