okay so homepage(54 w/ no next button), previous (53), from here both next and latest buttons go to 54 w/ next button. latest button on *any* page 54 and earlier goes to 54 w/next button. 54's next button takes you to 55, latest button on 55 and later goes to 2.0.1. and it's confirmed you can loop using the next button since 2.0.1 takes you to 54. Okay think I'm done now, good luck!
I'd suggest reloading, clearing the cache or trying it in a private window - I saw the same error at first, but it's stopped happening on my end, and if it's something wack going on with the database there's basically nothing I can do to actually fix it since nothing on my end of the site is broken; everything's in the right place and linked up correctly, as evinced by the fact that it's been working until now, so if the linked list the pages are sorted in is fucking up now it's probably because it's having trouble accessing the database at all. I did get an "error establishing a database connection" at one point, which makes me think it might be a little overloaded.
















