Help with the lcd output of arduino

The lcd screen does not show anything how can I solve the problem?

the code:Archiving built core (caching) in: C:\Users\ccc\AppData\Local\Temp\arduino_cache_65387\core\core_arduino_avr_uno_0c812875ac70eb4a9b385d8fb077f54c.a Sketch uses 4390 bytes (13%) of program storage space. Maximum is 32256 bytes. Global variables use 455 bytes (22%) of dynamic memory, leaving 1593 bytes for local variables. Maximum is 2048 bytes. Invalid library found in C:\Users\ccc\Documents\Arduino\libraries\lcd_testing: C:\Users\ccc\Documents\Arduino\libraries\lcd_testing

Your LCD screen isn't showing anything because the sketch did not upload to the Arduino. Looks to be some sort of problem with the library you are trying to use.