I have the same problem as in this question but with Ubuntu.
I tried everything but the problem persists. When I try and view a manpage I get an empty page. What can I do about it?
When I try to view my own manpage I get this error:
$ man -l openshell2017/opsh/man/opsh.1
It seems the bug also is reported at this link.
man: command exited with status 3: /usr/lib/man-db/zsoelim | preconv -e UTF-8 | tbl | nroff -mandoc -Tutf8
It is also a bug reported at Launchpad: https://bugs.launchpad.net/ubuntu/+source/man-db/+bug/1389682
I think what I did was remove all the manpages to save disk space and then I reinstalled them.