Hi experts,
After i upgraded some application from theme 25 to Universal Theme(UT) everything went fine except one of my DA process.
I use one DA (Page load) where i change background color of #uheader div due to different department wants to have different color of it.
It wors in Theme 25.
Now i would like to do the same in UT. I used .t-Header-branding class for it. When i change it via Firebug - it looks as i need. But if i do the same process:
DA -> Page load -> set style -> jQuery selector -> .t-Header-branding it throws firebug console error:

Is there some order of jQuery loading and theme component loading ?
Or something else?
I reproduced it on apex.oracle too:

https://apex.oracle.com/pls/apex/f?p=16502
demo/demo
check Title + CSS and you can see the error in console.
If i use the same for classic page item etc. everything is OK.
The best way for me should be create some another Theme definition by Theme Roller and save it and programmatically change it based on department variable is set.
Regards
J