The signal RS and E (Enable) have the same values at the same time (are equal).
This is not correct and the problem is not in the library if you are using the latest version of LiquidCrystal.
Your power is connected properly since you get the row of blocks on the top row. Your contrast may need adjusting later but that is not your first priority right now.
Remove all of the the data and control wires between the LCD module and your Arduino board and then reconnect them by following one of the tutorials listed below. If you are using a solderless breadboard then try using a different location on that board as one or more of the contacts may be bad.
Don't forget to deal with R/W (pin 5) on the LCD module.
If you can't get your LCD working by following these then you probably should consider a different hobby.