Maven artifact not found: http://ift.tt/2a8na5p

Hi,
i get this error
Maven artifact not found: http://ift.tt/2a8na5p, i am not sure from where this comes from !
added firebase ,
got maps api key
all manifest edited firebase/ maps
#AdditionalJar: com.google.android.gmslay-services-map
I followed all instructions for maps now i get this message

any clues
thanks AH

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