Error: Argument error
operation: HB_HHASKEY
[ 1] = U nil
[ 2] = C function
called from: HB_HHASKEY, line: 0
called from: pcode.hrb, MAIN, line: 9
called from: HB_HRBDO, line: 0
called from: ../source/exec.prg, EXECUTE, line: 70

Source:
0007:    hb_jsonDecode( AP_Body(), @hValues )
0008:
0009 =>   if ! hb_HHasKey( hValues, "function" )
0010:       return nil
0011:    endif