error time compiling

Arduino: 1.6.9 (Windows 10), Board: “ESPresso Lite 2.0, 80 MHz, 4M (1M SPIFFS), ck, v2 Lower Memory, Disabled, None, Only Sketch, 115200”

In file included from C:\Users\User\AppData\Local\Temp\arduino_modified_sketch_581858_2000_ESPert_workshop.ino:6:0:

D:\Users\User\Documents\Arduino\libraries\ESPert\src/ESPert.h:16:17: fatal error: DHT.h: No such file or directory

#include <DHT.h>


compilation terminated.

exit status 1
Error compiling for board ESPresso Lite 2.0.

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

how to solve this problem??

When you see a "No such file or directory" error that almost always means you need to install the library that contains the missing file, in this case DHT.h.