Cryptlib not working for flutter IOS

[Javed1191]

Hi
I am getting below error while I am trying to run app on iOS device.
It's working for android properly.

Undefined symbols for architecture x86_64:
"OBJC_CLASS$_CryptlibPlugin", referenced from:
objc-class-ref in GeneratedPluginRegistrant.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)