Code:
1x Details\Libs\DF\fw.lua:3388: D!Framework (DetailsFrameworkButtonNumber122204:OnMouseUp()) error: Details\functions\dungeon.lua:547: attempt to call method 'SetBackdrop' (a nil value)
====================
[string "@Details\Libs\DF\button.lua"]:918: in function <Details\Libs\DF\button.lua:831>
====================
[string "=[C]"]: in function `error'
[string "@Details\Libs\DF\fw.lua"]:3388: in function `CoreDispatch'
[string "@Details\Libs\DF\button.lua"]:918: in function <Details\Libs\DF\button.lua:831>
Locals:
(*temporary) = "D!Framework (DetailsFrameworkButtonNumber122204:OnMouseUp()) error: Details\functions\dungeon.lua:547: attempt to call method 'SetBackdrop' (a nil value)
====================
[string "@Details\Libs\DF\button.lua"]:918: in function <Details\Libs\DF\button.lua:831>
====================
"
Looks like this bit of code hasn't been updated for the 9.0 changes.