After upgrading to the latest Mantis version, I had a problem with zip attachments being corrupted when downloaded from Mantis. Turns out his error message is added to the files:
SYSTEM WARNING: ‘finfo::finfo() [finfo.finfo]: Failed to load magic database at ‘/etc/magic’.’ in ‘/srv/sites/mantis.progi-media.com/htdocs/core/utility_api.php’ line 273
To fix the problem I had to manually configure the proper path to the magic file on the server.
First I located the magic database file through the man page for magic
# man magic
magic – file command’s magic number file
This manual page documents the format of the magic file as used by the file(1) command, version 4.17. The file command identifies the type of a file using, among other tests, a test for whether the file begins with a certain magic number. The file /usr/share/file/magic specifies what magic numbers are to be tested for, what message to print if a particular magic number is found, and additional information to extract from the file.
Then I added a new configuration entry to the Mantis configuration file: config_inc.php. This file is located at the root of the Mantis folder and can be edited by any text editors such as nano, pico or vi.
$g_fileinfo_magic_db_file = '/usr/share/file/magic'