As quoted from the linked post.
It looks like you’re part of one of our experiments. The logged-in mobile web experience is currently unavailable for a portion of users. To access the site you can log on via desktop, the mobile apps, or wait for the experiment to conclude.
This is separate from the API issue. This will actually BLOCK you from even viewing reddit on your phone without using the official app.
Archive.org link in case the post is removed.
Well thats concerning. Hope the revenue they get from API access and forcing ads will offset the communities they are pushing away. Im about to delete my reddit account over this. Lets hope lemmy can gain traction.