See what Korn has to say about this topic.

Posted by Korn 3 years ago (Source)

Hi all,

we just release a new apk for Android devices that should fix the recent issues with installing and updating the game.

It can be downloaded directly at this link:…-full-1.16.396.165930.apk

Please let us know if this resolves the issues for you and report any errors to us.

If you still have problems with installing the game, please try the following:
  • Fully uninstall the old client. Then, reboot your phone. Then try to install the new client
  • Make sure that you have enough free storage space on your device. To be on the safe side, aim for at least 4 gb (better 5gb) of free space before downloading the new apk.
  • If you get an error saying that the app ist not trusted / from an unknown source etc, please check this article:

Posted by Korn 3 years ago (Source)

Nenmor wrote:

I downloaded again and tried to install. But unfortunately result is the same.
I played this game via my mobile till this last patch. I don't know why but system/Android refuses to install the app. It says don't trust the publisher. Anything changed in between last two patches?

Hm, the warning that the device does not trust the publisher etc. often happens if you install an app directly from the .apk. As far as I know, it should be possible for override / ignore this error message.

Please take a look at this:

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