White boxes in first row of 16X2 LCD display

Thanks a lot! After uploading this code, the LCD display has started displaying the text.
Just have a look at this image. Thanks once again!
Here's the link to the image: https://drive.google.com/file/d/16iWuJKp_5tFWG8pTHYAdLE6YuDKwmV_5/view?usp=sharing