@Clive_A thanks a lot! I used serial port to reset switch and it is working again. We can close this topic. Thank you all

@Clive_A ok so I unplugged switch, restarted it and I plugged it again. Nothing happened. Same IP, Same error.. I'm stuck and I have no ide what to do...

@Clive_A Thank you for response. I was getting: "Device adoption failed, device does not respond to adoption functions." I cant get access to router so by reboot you mean unplug cable between router...

@Clive_A Thank you for help! That was my first idea to reset switch to factory settings and try to connect / adopt it again. Unfortunately I dont have Serial cable so Im waiting for usb adapter. The...

Hmm..but its connected to same network. I have router, than cable is going to switch and all devices are plugged into my switch

@MR.S thank you for help. To be honest I cant do nothing when Im clicking on switch. Until its not adopted there is no any options on switch