Wifi authentication problem

After rooting, Playstore didn't worked properly and in one turorial stood that changing Ip adress may helps. So i went to advanced settings, changed DHCP to static and then, what probaly sounds stupid, i also changed my IP adress to the same as the one shown in the tutorial picture. Since then i get authenfications problems the whole time.

I've switched back to DHCP, restarted my phone and router and even formated my phone because i thought it would fix this. Apparently i still have...

Wifi authentication problem

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