Open CancelAuras.lua in any text editor.
(You can find this file at
World of Warcraft\_retail_\Interface\AddOns\CancelAuras)
Find this part:
Lua Code:
function cancelauras_OnEvent(this, event, ...)
for i=1, 40 do
Change it to this:
Lua Code:
function cancelauras_OnEvent(this, event, ...)
if IsInInstance() then return end
for i=1, 40 do