Hi! In README example for non-FreePBX parkin
[fop2-park]
exten => _X.,1,Set(ARRAY(RETURN_EXTENSION,RETURN_CONTEXT,PARKBUTTON)=${CUT(EXTEN,:,1)},${CUT(EXTEN,:,2)},${CUT(EXTEN,:,3)})
exten => _X.,2,GotoIf($["${PARKBUTTON}" = "PARK/default"?5)
exten => _X.,3,GotoIf($["${PARKBUTTON}" = ""?5)
exten => _X.,4,Set(PARKINGLOT=${PARKBUTTON:5})
exten => _X.,5,Park(,${RETURN_CONTEXT},${RETURN_EXTENSION},1,s)
In Goto lines (line 2,3) missing ']'