Most probably you have a mixed configuration, some things from an rpm/market installation, and some things from a manual installation.
[fixed]
cat /etc/asterisk/fop2
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Do you see "-c /etc/asterisk/fop2" in the OPTIONS line? If you do, and you installed FOP2 2.28 by hand, then remove that and restart the service, so configurations and scripts are loaded from the default location in /usr/local/fop2