I'm using it on my 4.2.2. Just look through a few issues some of us had to adjust the navbar issue.

I've just installed on my board and it shows my server offline and some warnings on the header

Is your website hosted on your game server??

Nope , isn't

Yeah you need to be on a hosting that allows those ports to be open otherwise it won't work. If you can install the lgsl feed on your game server it would work otherwise it's useless.

I can't change the adress where this plugin reads info about the server ?

I am saying the Web host you're on needs those game ports open so your website can retrieve the data from the query it runs whenever the scheduled task is performed to get your game server information.

So isn't any methods to fix this ?

Well by default vBGamez pointed the query script to their hosting so it always worked but since their website is gone the query is closed but you can am it to your own hosting but it has to be on your own dedicated server because 99% of website host blocks all those ports and will not open them for security reasons.

I have my own server dedicated , how cand i do ?