@thebakedchef The issue there is that there doesn't seem to be a global issue, as there aren't mass reports (I was able to connect last night with no issue too). This, along with the message you're receiving, implies that it is an issue with your own connection.
The only other suggestions I can give are to check with your ISP, and ensure that crossplay is enabled and you're connecting to populated modes (you could test this with the Portal browser and seeing what happens when you connect to populated experiences).