Unity 2019.1, 2018.3, and 2017.4 ALL unable to start the package manager

This issue, as experienced by multiple other people in the community, starting all the way in 2016 has still not being fixed, and occurs to me at least every couple months - this greatly impacts my development ability, and I'm sure it does so for multiple people. The hotfixes released by unity do not solve the issue, nor do different versions of unity, so this must be a hub issue.

What I've tried so far:

• noproxy

• disabling firewall

• whitelisting/ disabling windows defender

• testing ports

• run as admin

• uninstall unity version

• install patches

I hope unity addresses this issue soon, as the only other option currently is switching over to unreal