I'm trying to install server and client and play around with 2 pc setup, but looks I have a trouble.

It needs nfs package installed so I already have that one:

Package 1:nfs-utils-1.3.0-0.54.el7.x86_64 already installed and latest version

but as I try to install server I have an error:

ERROR: Could not find the NFS daemon.
Make sure that nfs-utils or an equivalent package is installed.
Exiting installer…
Error: Could not install HQueue.

Could anyone help to solve this?

When using Linux you need a couple prerequisites. This video goes over it well - I've linked you to the specific timestamp with your issue.

https://youtu.be/EFBy8J6p5vE?t=1m15s [youtu.be]

Yes, thanks for a link, but I already have nfs installed. I am able to mount nfs shares and share them with other devices on my network.