When dragging UFO icon to dominos action bar, no icon show in the bar. Some debug string showed in chatbox:

And some errors occurred:

Interface/FrameXML/SecureTemplates.lua:120: Wrong object type for function
Count: 41

Call Stack:
[string "=[C]"]: in function `GetAttribute'
[string "@Interface/FrameXML/SecureTemplates.lua"]:120: in function `SecureButton_GetModifiedAttribute'
[string "@Interface/FrameXML/SecureTemplates.lua"]:125: in function `SecureButton_GetModifiedAttribute'
[string "@Interface/FrameXML/SecureTemplates.lua"]:138: in function <Interface/FrameXML/SecureTemplates.lua:137>

Dominos version: 10.2.28
UFO version: 10.2.6
Both are latest version on curseforge.

Edit

I tried to rollback to old version of Dominos one by one, it turns out that the last usable version of Dominos is 10.2.14b and when updating to 10.2.15 the icons in actionbar disappeared.

Excellent report with useful info, thank you! Even though debugging Dominos/ElvUI/etc is my least favorite part of supporting UFO, I feel indebted by your effort here :-)

Ok, I updated Dominos and dug in a little but so far no clear leads on the cause. Will keep at it.

ref: tullamods/Dominos@10.2.14b...10.2.15