Bypass reactivation lock at a samsung galaxy s6 G920F?

Hi guys,

I searched in google how to bypass the samsung account, but nothing helped. It was possible to downgrade to 5.1.1 and access to settings with the tool f-samsung.exe. But I cant add a samsung account, if I click on nothing happens. I think samsung patched this bug, but I have downgraded? Maybe they put it in the bootloader or something? Does someone have any other solutions?

Thanks alot!