Can't log into Minecraft, crashes before main screen is displayed

I receive this warning on the game output screen:

Local file C:/Users\kevin\AppData\Roaming\.minecraft\assets\indexes/1.11.json has wrong SHA-1 hash, expected ea7f56173691250e9805db5e3dda2d65b951ede3 but was e02b8fba4390e173057895c56ecc91e3ce3bbd40