Action chain not defined in vbEnter of home page VBCS

Summary:

The above is the action chain that I have called on vbEnter of the root/shell file in VBCS. setSessionLanguage is the action chain in the same shell file. It is getting executed and I can also get alerts which are added in the js function called in setSessionLanguage but in console i get setSessionLanguage action chain not defined.

I also tried adding the js function directly instead of calling it from the action chain. But then also it gives console err as js function not defined, but it gets executed and I get the alert from that js function.