minecraft question mark bug on minecraft launcher

I have add all the minecraft version and I downloaded OptiFine and install but, it said download 1.12.1 first so, I went but when I go in, front of everything there where questions mark...

eg. 1.12 ?????? ?????????

I was so, scared that in my mind I only had think of not doing minecraft I did for 4 years of minecraft but, this was first time but, I think minecraft is still fun!