"SELF_SIGNED_CERT_IN_CHAIN" error behind self-signed SSL network

The more we know about your system and use case, the more easily and likely we can help.

#### Environment info
* OS: Win 10

* App Version (`Command/Ctrl + ,`):
Who knows / Doesn't matter:
Who knows: Theres no way to tell from the application when its stuck not logging in
Doesn't matter: The behavior is the same between 1.5.0 and 1.5.1-alpha

#### Description of the problem / feature request / question:
No version of Lepton has never logged in to GitHub for me. I have deleted the C:\Users\\AppData\Roaming\Lepton\ folder multiple times - it has zero effect

#### If possible, provide a sample gist or screenshot:

#### If possible, provide the log files
- Mac: `~/Library/Application Support/Lepton/logs`
- Windows: `C:\Users\\AppData\Roaming\Lepton\logs`
- Linux: `~/.cached/Lepton/logs`
>The [debug mode](https://github.com/hackjutsu/Lepton/wiki) is recommended when producing the logs.
>You can send your log file to cosmo.lepton@gmail.com if don't want to post it here.

[2017-12-12T22.45.02.250Z.log](https://github.com/hackjutsu/Lepton/files/1553584/2017-12-12T22.45.02.250Z.log)