Failed to load URL mojang://launcher/index.html with error ERR_FAILED (-2).

Hi, 

Im unable to load Minecraft as it says "Failed to load URL mojang://launcher/index.html with error ERR_FAILED (-2)." It wont allow me to open the app at all.

I have tried deleting all my Minecraft files and downloading again, restarting my Macbook etc. Nothing is working. I bought the game in early November and it still doesn't work. Ive contacted the store i bought it from and Apple to see if my laptop was blocking it. I tried on my PC and it worked fine, but I dont use that computer anymore. I cannot find a soultion.