What steps will reproduce the problem?
1.Turn in a completed daily quest

What is the expected output? What do you see instead?
Everything is as expected except that an error is generated.

What version of the product are you using?
4.7

Do you have an error log of what happened?

EveryQuest-2.4.r217-release\events.lua:123 attempt to index field '?' (a nil value)
EveryQuest-2.4.r217-release\events.lua:117 in function <EveryQuest\events.lua:115
(tail call): ?:
<in C code>: in function `GetQuestReward'
Blitz-4.7\Blitz.lua:132 in function `?'
Blitz-4.7\Blitz.lua:41 in function <Blitz\Blitz.lua:41

Please provide any additional information below.
I have been seeing this error for some months, and finally took time to try troubleshooting steps.
Disabling Blitz causes the error to not appear. Some time soon I will disable EveryQuest to discover if I see the error with only Blitz loaded.

If I also have Wowhead_Looter enabled, the error appears as follows:

EveryQuest-2.4.r217-release\events.lua:123 attempt to index field '?' (a nil value)
EveryQuest-2.4.r217-release\events.lua:117 in function <EveryQuest\events.lua:115
(tail call): ?:
<in C code>: ?
+Wowhead_Looter-40017\Wowhead_Looter.lua:1177 in function `GetQuestReward'
Blitz-4.7\Blitz.lua:132 in function `?'
Blitz-4.7\Blitz.lua:41 in function <Blitz\Blitz.lua:41