To reproduce: - Have a clean install: $ SKIP_WEBINSTALLER=1 CREATE_ADMIN_USER=1 vagrant up - Log in - Use the 'Search catalog' tab, search the letter a => FAIL: Internal server error koha-plack-err shows: Template process failed: undef error - The given date (04/01/2017) does not match the date format (iso) at /usr/share/koha/lib/Koha/DateUtils.pm line 152.
I've just imported a bunch of MARC records into the catalog, and the problem vanished, might be related.
I do not recreate with an existing install (removed zebra index and biblios).
I've just discovered that there was a problem in kohadevbox that made it fail to load the git clone's libs, and used the packaged ones. That was the root cause for this. Now that I fixed kohadevbox, I can no longer reproduce the issue.