WowUp installed. Up to date. Happens every time I log in, sometimes forces me to dc. Three errors broken by numbers.

2324x DPM-Core\DPM-Core-5.1.lua:1393: attempt to call global 'SendAddonMessage' (a nil value)
[string "@DPM-Core\DPM-Core-5.1.lua"]:1393: in function <DPM-Core\DPM-Core.lua:1384>
[string "=[C]"]: in function LoadAddOn' [string "@FrameXML\UIParent.lua"]:495: in function UIParentLoadAddOn'
[string "@FrameXML\UIParent.lua"]:768: in function Communities_LoadUI' [string "@FrameXML\UIParent.lua"]:1055: in function ToggleCommunitiesFrame'
[string "@FrameXML\UIParent.lua"]:905: in function `ToggleGuildFrame'
[string "@FrameXML\MainMenuBarMicroButtons.lua"]:421: in function <FrameXML\MainMenuBarMicroButtons.lua:419>
[string "=[C]"]: ?

Locals:
self = {
0 =
}
event = "ADDON_LOADED"
(*temporary) = nil
(*temporary) = "DPMversion"
(*temporary) = 5.100000
(*temporary) = "GUILD"
(*temporary) = "attempt to call global 'SendAddonMessage' (a nil value)"

5784x DPM-Core\DPM-Core-5.1.lua:1387: attempt to call global 'SendAddonMessage' (a nil value)
[string "@DPM-Core\DPM-Core-5.1.lua"]:1387: in function <DPM-Core\DPM-Core.lua:1384>

Locals:
self = {
0 =
}
event = "GROUP_ROSTER_UPDATE"
(*temporary) = nil
(*temporary) = "DPMversion"
(*temporary) = 5.100000
(*temporary) = "RAID"
(*temporary) = "attempt to call global 'SendAddonMessage' (a nil value)"

90x DPM-Core\DPM-Core-5.1.lua:143: attempt to call method 'GetBackdrop' (a nil value)
[string "@DPM-Core\DPM-Core-5.1.lua"]:143: in function RuneCreateFrame' [string "@DPM-Core\DPM-Core-5.1.lua"]:719: in function LoadAdjustAuras'
[string "@DPM-Core\DPM-Core-5.1.lua"]:1400: in function <DPM-Core\DPM-Core.lua:1384>

Locals:
name = "DPM_AFrame"
x = 0
y = 0
parent = nil
width = 210
height = 325
move = true
mouse = true
rto = nil
rpoint = nil
Parent = nil
FrameLevel = 4
RelativeTo = "CENTER"
RelativePoint = "CENTER"
Fx = 0
Fy = 0
FName = "DPM_AFrame"
FWidth = 210
FHeight = 325
MoveAble = true
MouseAble = true
FFrame = DPM_AFrame {
0 =
}
(*temporary) = nil
(*temporary) = DPM_AFrame {
0 =
}
(*temporary) = nil
(*temporary) = StaticPopup1 {
0 =
SubText = {
}
ItemFrame = StaticPopup1ItemFrame {
}
Border = {
}
button3 = StaticPopup1Button3 {
}
extraFrame = StaticPopup1ExtraFrame {
}
button4 = StaticPopup1Button4 {
}
button2 = StaticPopup1Button2 {
}
moneyFrame = StaticPopup1MoneyFrame {
}
button1 = StaticPopup1Button1 {
}
text = StaticPopup1Text {
}
editBox = StaticPopup1EditBox {
}
extraButton = StaticPopup1ExtraButton {
}
Separator = {
}
moneyInputFrame = StaticPopup1MoneyInputFrame {
}
icon = StaticPopup1AlertIcon {
}
itemFrame = StaticPopup1ItemFrame {
}
CoverFrame = {
}
}
(*temporary) = "attempt to call method 'GetBackdrop' (a nil value)"

DPM is a 3rd party module that's grossly out of date and incompatible with DBM. Deadly PVP Mods (DPM) is not to be mistaken for DBM-PvP or DBM-Core. You will want to remove DPM-Core immediately