agent freeradius cannot be run

[harleydica]

Does anyone know why the freeradius application agent cannot be run? an error appears like this

root@radius-eap:/usr/lib/observium_agent/scripts-enabled# /usr/lib/observium_agent/scripts-enabled/freeradius.conf PHP Parse error: syntax error, unexpected token “&”, expecting “)” in /usr/lib/observium_agent/scripts-enabled/freeradius.conf on line 54

please can someone help me?