Computer automatically boots to the GRUB command line

Ever since I installed Manjaro on my PC (dual booting with Win10,) it automatically boots to the grub command line. I had to press the boot key everytime I turn on the computer, if not then it will proceed to the command line. Unfortunately, I don’t know how grub works so I just type reboot then spam-press the boot key again, then choose Manjaro.

How do I boot it automatically to Manjaro without the GRUB command line?