Clicking a topic or a (sub)forum gets a white page and the message;

Clicking a post gets the Subeta error screen with the message;

And the url isn't referring to the forum post, but it's trying to point toward a news post with the following URL;

https://subeta.net/forums.php/gotopost/news.php

Refreshing a few times does make the post/topic/subforum appear.

It's fixed, thank you!