1.14 / 1.15 not working (Mac)

Failed to start download.
Name: 1.15.json
URL: https://launchermeta.mojang.com/v1/packages/62745391056f1d0e1ffc808a0d4f0145b668ca24/1.15.json
Error details: No such file or directory
Couldn't open file for download
Filename on disk: 1.15.json
Path: /Users/LukaBatson11/Library/Application Support/minecraft/assets/indexes/1.15.json
Exists: Nonexistent