I didn't get an error logging into the toon but I hearthed back to Boralus and got it when I arrived at the inn. I haven't touched any of my buttons since updating. It was my mage so he has portal and teleport flyouts.

4x ...aceNeuron\Objects/ACTIONBUTTON_FLYOUTBTN.lua:963: attempt to call method 'SetObjectLoc' (a nil value)
...aceNeuron\Objects/ACTIONBUTTON_FLYOUTBTN.lua:963: in function <...aceNeuron\Objects/ACTIONBUTTON_FLYOUTBTN.lua:963>

Locals:
self = NeuronFlyoutBar1 {
0 =
WrapScript = defined @FrameXML\SecureHandlers.lua:782
index = 1
keybind = NeuronFlyoutBar1KeyBind {
}
Execute = defined @FrameXML\SecureHandlers.lua:777
text = NeuronFlyoutBar1Text {
}
data =

{
}
handler = NeuronFlyoutHandler1 {
}
UnwrapScript = defined @FrameXML\SecureHandlers.lua:788
objCount = 13
SetFrameRef = defined @FrameXML\SecureHandlers.lua:793
objPrefix = "NeuronFlyoutButton"
elapsed = 0
messagebg = NeuronFlyoutBar1MessageBG {
}
class = "bar"
message = NeuronFlyoutBar1Message {
}
}
(*temporary) = nil
(*temporary) = NeuronFlyoutBar1 {
0 =
WrapScript = defined @FrameXML\SecureHandlers.lua:782
index = 1
keybind = NeuronFlyoutBar1KeyBind {
}
Execute = defined @FrameXML\SecureHandlers.lua:777
text = NeuronFlyoutBar1Text {
}
data = {
}
handler = NeuronFlyoutHandler1 {
}
UnwrapScript = defined @FrameXML\SecureHandlers.lua:788
objCount = 13
SetFrameRef = defined @FrameXML\SecureHandlers.lua:793
objPrefix = "NeuronFlyoutButton"
elapsed = 0
messagebg = NeuronFlyoutBar1MessageBG {
}
class = "bar"
message = NeuronFlyoutBar1Message {
}
}
(*temporary) = "attempt to call method 'SetObjectLoc' (a nil value)"