[MAC] Launcher white screen, A system error has occurred: -7 HTTPS System Error

[Leanox]

The launcher keeps failing on boot, either results in a white screen with an error message that says:

"FFXIV Launcher

A system error has occurred: -7.
HTTPS System Error"

or it results in a white screen with normal text, no buttons or anything. Looks like a text document.

"Due to ongoing maintenance, this page is currently unavailable.
Please try again later.

*
*

Language
(Language selection box here that you can't click on.)

*
*
*
*
*

*
*
*
*

The update patch is currently downloading.
Depending on your computer's specs,
you may experience slowdown while creating your character.
Proceed?"

I've tried everything I could think of, but to no luck solving the issue. 1/20 times the launcher loads successfully and allows me to play. But it's a persistent issue.

I'm on a Imac, 27 inch, late 2014 model, running iOS Mojave 10.14.