Validation issues found

Setup, Configuration and Use Items & Sitemaps
1

Just changed back to snapshot and noticed a new message in the log:

[INFO ] [el.core.internal.ModelRepositoryImpl] - Validation issues found in configuration model ‘default.sitemap’, using it anyway:
Linkable widget should contain either only frames or none at all

This is the portion of my sitemap that has been identified as being related, i.e. Frame under Group :

		Group item= UPS label= "UPS" icon="energy" {
		Text item= Ups_Model
		Text item= Ups_Input_Voltage 
		Text item= Ups_Output_Voltage
		Text item= Ups_Load
		Text item= Ups_Runtime
		Text item= Ups_Status
		Frame label= "AC voltage" {
		Chart item= Ups_Input_Voltage period=D refresh=30000
			}
		}

Should I leave this as it is and ignore the message or any change is required?

2

My initial issue was solved by putting all the text items into a separate frame.
After the recent upgrade another new message has appeared:

[INFO ] [el.core.internal.ModelRepositoryImpl] - Validation issues found in configuration model ‘demo.rules’, using it anyway:
There is no context to infer the closure’s argument types from. Consider typing the arguments or put the closures into a typed context.