Problem in Library

Arduino: 1.8.3 (Windows 7), Board: “Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)”

Build options changed, rebuilding all
In file included from C:\Users\hari\Documents\Arduino\libraries\SimpleTimer-master\SimpleTimer.cpp:27:0:

C:\Users\hari\Documents\Arduino\libraries\SimpleTimer-master\SimpleTimer.h:37:22: fatal error: functional: No such file or directory



compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Mega or Mega 2560.

I am trying to Simpletimer and blynk library, but I getting the above error. I have tried to rectify the problem, but I could not find it. Please help

Post a link to where you downloaded this SimpleTimer library from. Please use the chain links icon when you post links to the forum to make them clickable.