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Error at upgrading addOn

Discussion in 'XenForo Development Discussions' started by Helmut2509, Mar 10, 2014.

  1. Helmut2509

    Helmut2509 Member

    I have three applications, which have the same addOn to be upgraded.
    With two of the applications, the upgrade works fine.
    But with the third application I always get the error:
    "Please enter a valid callback method (AvatarGallery_Listener::load_class)."
    On the page
    it is simply recommended to repeat the upgrade, but that is of no avail.
  2. Chris D

    Chris D XenForo Developer Staff Member

    That usually indicates you have uploaded the files incorrectly.

    Ask in the discussion thread for the add-ons that are failing to install for support.

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