I looks like the import could not convert all URLs liking to other posts. As discovered by user @rise in this thread Hardware to run Dude server - #5 by rise
The links in the Related posts section all have empty a-tags:
In the old forum, as seen with the Wayback archive Hardware to run Dude server - MikroTik, the links all had valid targets to other posts. We can still extrack the https://forum.mikrotik.com/viewtopic.php?t=xxxxxx parts to view the posts/threads in the new forum.