Dahua DH-SD59220T-HN, easy4ip failure

Just testing a system which will be installed next week. Consists of two Dahua HFW4421S and one DH-SD59220T-HN cameras.

The problem is that I cannot get DH-SD59220T-HN to login in Dahuas easy4ip / p2p system. When I click in setup network -> tcp/ip -> choose tab

easy4ip, UI immediately says "operate failed". Save button is grayed and if I click default, UI says "default failed". In smaller bullet cameras it works nice,

and they are connected of course in the same network.

Then I checked also one other 59220 which was installed last november. It has the same FW version (26.5.16) and also the same issue. Can't login to easy4ip..

Did not find (newest) firmware for the camera.