When I try to make squad (I have 151k coins) then I get error " You don't have privilege to change squad "
And I don't even have a squad right now.
Please some one help me !!!

You are not alone in this.
Zup needs to look into what is causing this and present a solution so that those who want to create a squad can do so.

This limited squadmember list of 50 is another thing he needs to take a look at.
How is a squad owner supposed to manage the squad if he can't see all the members?

How to create that squad ???

Windows can make squads at this time with no problems. We had the same problem post your in game name device and what squad you are trying to make Zup then can log on your account and try to find the bug that's stopping it. That's what he had to do for windows. if not he can use ur account to make a test squad then you can can take it over. The ingame name can't change if you want his help and he needs the exact way you have it in game.

this was fixed last week. I guess you are using iPhone or ipad because apple is the only one that hasn't released the update yet. If you can get your hand on a windows 8 or android, you can do it from there.