I think I have found something.
So, I can sometimes successfully post but it takes a few minutes for the page to load.
When it is successful it says it's waiting for api.viflink.com, Takes about 10 to 20 seconds, then the page is saying 'establishing secure connection' and sitting there another 30 seconds to 2 minutes, then I show that the connection isn't secure and that the site doesn't have a valid certificate.
Then sometimes I simply can't post.
When it is unsuccessful it just sits there at 'establishing secure connection' and does nothing. I can type in the message box but hitting the preview or post buttons does nothing.