Every UI reload throws this error. I tried disabling all addons except ElvUI and ElvUI enhanced with got rid of the error, but re-enabling only Datatext Bars 2 in addition causes it to come back. I didn't have this issue during WoD.

"Message: ...dOns\ElvUI_Enhanced\modules\datatexts\extratexts.lua:208: attempt to index local 'datatext' (a nil value)
Time: 10/04/16 11:11:15
Count: 1
Stack: [C]: ?
...dOns\ElvUI_Enhanced\modules\datatexts\extratexts.lua:208: in function HookClickMenuToEmptyDataText' ...dOns\ElvUI_Enhanced\modules\datatexts\extratexts.lua:259: in function <...dOns\ElvUI_Enhanced\modules\datatexts\extratexts.lua:251> [C]: in function?'
...dia\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:145: in function <...dia\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:145>
[string "safecall Dispatcher[1]"]:4: in function <[string "safecall Dispatcher[1]"]:4>
[C]: ?
[string "safecall Dispatcher[1]"]:13: in function ?' ...dia\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90: in functionFire'
...AddOns\ElvUI\Libraries\AceEvent-3.0\AceEvent-3.0.lua:120: in function <...AddOns\ElvUI\Libraries\AceEvent-3.0\AceEvent-3.0.lua:119>

Locals:

I'm running into the same issue and I see it was reported and acknowledged about 8 months ago. Any idea if it can/will be resolved?