google maps can't access the gps on marshmelow b500 on MT7-L09!

hi ; i was using andoid 4.4.2 kitkat on my huawei ascend mate 7 MT7-L09 and everything was fine, i decided to upgrade android to version 6 marshmelow and i did it, after upgrading everything was fine untill i wanted to use google maps navigation, it can't access gps signal at any place! every other app can access gps signal and works fine but google maps can't access gps location!
how can i fix it?

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