Remember how Elon Musk toyed with the idea of rolling out a subscription service (a paid service, mind you) for Twitter users? Yeah. The deployment of that was actually pushed back, from mid February til apparently this morning.
Users are reporting their ability to click any kind of links on the platform result in the same error message.

So far, there has been no official comment from Musk or Twitter about the rollout or current issue. We’ll let you know what we hear.
Even hyperlinks to the official development team docs aren’t currently working. Tweet embeds and photo uploading are also not currently working.