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XF 1.5 Error

Discussion in 'XenForo Questions and Support' started by YellowDev, Jun 12, 2016.

  1. YellowDev

    YellowDev Member

    Whenever i try to install a add-on it comes up with a error like this.
    Callback XenStaff_Addtab::navigationTabs is invalid (Invalid Class).
  2. Mike

    Mike XenForo Developer Staff Member

    I've responded to your ticket about this, but this is generally indicative of files not being uploaded as expected. You'll need to contact the add-ons authors to check that you've followed their specific packaging instructions though.

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