[Koha] 500 Errors on search after update

[Keith Sorbo]

After upgrading to the latest (22.05.02.000), I am getting 500 errors when
a search should return a biblio entry. This happens on the OPAC and when I
do a search under the cataloging section in the staff site. I am able to
search for patrons with no  apparent problem.(I did have quite a bit of
trouble updating my database)

I ran rebuild zebra and it made no difference.

How do I detect what is causing this problem?