@Derek I just modify in x10hosting. I already set DNS to ns1.x10hosting.com and ns2.x10hosting.com
Maybe there is an internal error? because I can modify domain to the other one successful.
I have try to modify domain but It's work. Before this I have modify domain to the other one and now I change it to the same domain. Ex.
Before : thailandonly.net
Change : hihappytour.com
Now : thailandonly.net <<< It's show error when I modify it.
I already try to read in support and...