I have found the solution to my problem. But I was confused why. Previously, I run the rails server on a git bash command line and it keeps spitting out the error message I show above. But then, I try to make a new app using Windows command line and repeat the same steps and run the server and it works! I was wondering what happen with my git bash command line. Does it have to do with PATH? or maybe I was missing something when I installed git bash?
The reason i said that is because when I run the rails server on my Windows command line, I saw that there is a [compiling...] step before finally running my server, but this steps does not occur when I run rails server on git bash. Can anybody provide an explanation about this?
Sorry, for the long-winded message. I am truly new to rails-react!! Thanks..