Grub Error

So today I was using grub customizer to change what grub automatically boots to so it worked fine I had no problem until I booted up my computer a couple times and now I'm getting this error "minimal BASH-like line editing is supported. For the first word, TAB lists possible command completion. Anywhere else TAB lists possible device or file completions.

Grub>" Please help I need my computer back up and running asap! Thanks!