[BUG] - OpenKH crashes if github throws an SSL error

[lallaria]

OpenKH Build 20220709.1

OpenKH Program OpenKH

Describe the Bug OpenKH will crash upon adding a mod from github if github throws an SSL error (could be any web response error).

To Reproduce Steps to reproduce the behavior:

1. Use an intermediary/proxy to github with a bad or no cert
2. Attempt to install any mod
3. OpenKH will crash

Expected behavior Any error message rather than a crash.

Additional context Was connected to a VPN that uses umbrella as an intermediary DNS. raw.githubusercontent.com is flagged on umbrella and requires an additional cert to be manually installed - if it is not installed it throws a missing cert SSL error.