Undefined control sequence. ctex_gadd_hook:Nn

I am writing my Thesis and facing this problem. I am using MikTex with Texstudio. Tried to resolve the issue but failed to find the solution. I need your help.

Here is the error

! Undefined control sequence.
l.170 ctex_gadd_hook:Nn
                         CJKhook { ctex_set_ignorespaces: }
?