Installing 3rd party APK - Deep Scanning/Unable to Install

Hi Guys,

Trying to install a 3rd party APK on my Marshmallowed S6 Edge (Non Rooted/Stock)

I get a deep scanning message and then - 'unable to scan ****.apk' and that's it!

Made sure that all my unknown install sources are ticked etc. Disabled Smart Manager.

any ideas?

Rich

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