We have fixed an issue in XenForo 2.1.6 which may have led to JavaScript errors on pages with checkboxes that have a "Select all" checkbox.
Fixed - XF.CheckAll no longer works as expected
Seems like this change now means that a boolean is returned and has led to the following error: Uncaught TypeError: $checkboxes.each is not a function at fn.updateState (form.js?_v=b9f32edd:1118) at fn.init (form.js?_v=b9f32edd:1101) at applyHandler (core.js?_v=b9f32edd:7567) at...
We have released XenForo 2.1.6 Patch 1 to resolve this.