Never mind. I figured out the problem and it was something I was doing, nothing wrong with the addon.
Recent Issues with oMail
Here recently, I've been experiencing problems with oMail not working. I receive the following errors:
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Message: Interface\AddOns\oMail\omail.lua:61: attempt to index upvalue 'ui_main' (a nil value)
Time: 12/28/14 19:06:17
Count: 2
Stack: Interface\AddOns\oMail\omail.lua:61: in function `?'
Interface\FrameXML\ChatFrame.lua:4387: in function `ChatEdit_ParseText'
Interface\FrameXML\ChatFrame.lua:4041: in function `ChatEdit_SendText'
Interface\FrameXML\ChatFrame.lua:4080: in function `ChatEdit_OnEnterPressed'
[string "*:OnEnterPressed"]:1: in function <[string "*:OnEnterPressed"]:1>
Locals: msg = ""
editbox = ChatFrame1EditBox {
 0 = <userdata>
 tabCompleteTableIndex = 1
 focusLeft = ChatFrame1EditBoxFocusLeft {
 }
 setText = 0
 chatFrame = ChatFrame1 {
 }
 addSpaceToAutoComplete = true
 language = "Orcish"
 focusMid = ChatFrame1EditBoxFocusMid {
 }
 headerSuffix = ChatFrame1EditBoxHeaderSuffix {
 }
 text = "/"
 Backdrop = <unnamed> {
 }
 autoCompleteXOffset = 35
 header = ChatFrame1EditBoxHeader {
 }
 addHighlightedText = true
 languageID = 1
 focusRight = ChatFrame1EditBoxFocusRight {
 }
}
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index upvalue 'ui_main' (a nil value)"
ui_main = nil
OMAIL_VERSION = "2.0.3"
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Message: Interface\AddOns\oMail\omail.lua:985: attempt to index field 'settings' (a nil value)
Time: 12/28/14 19:10:52
Count: 2
Stack: Interface\AddOns\oMail\omail.lua:985: in function `oMail_OnMailboxUpdate'
Interface\AddOns\oMail\omail.lua:839: in function <Interface\AddOns\oMail\omail.lua:835>
Locals: (*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field 'settings' (a nil value)"
om = <table> {
 enabled = 1
}
grab_items = 0
grab_money = 0
next_grab_tm = 183878.223
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