Cant enable Guest mode in Marshmallow

[AC Question]

Hello. i have Elephone P9000 with Marshmallow and multiuser or guest mode dont work because when i tap on the Blue Avatar to do that nothing happens. Must i first configure my avatar (account) to my Picture and details appear and change that image?? is there some secret menu? thanks very much for the help.
Armenio (Portugal).

 

[Javier P]

Welcome to the forums. See if you can get this option in settings - users. You can change that avatar in your Contacts app under 'Me' (imagino que em português aparece como EU).