In Elgg 1.9.4 : "Deprecated in 1.8: Do not rely on $vars["url"] being available in views"

Fresh install of Elgg 1.9.4 - I keep on getting the error/system message:
"Deprecated in 1.8: Do not rely on $vars["url"] being available in views"
It seems not to appear consistently all the time but it does appear from time to time, at least to the admin user.

I have these plugins (all latest) : tidypics, liked content, file_takeout, Blog_tools. Disabling may not be disappearing the error message - probably.

I am confused and I understand I need to investigate more - any clue will be welcome.
Is there any settings/plugin/hack that shows these red error/system messages to the super-admin/admin only?