I checked you ads file. It looks like you were confused by the pin number of the subcircuit. The correct order should be
Symbol pin# Name Subcircuit Name
----------------------------------------------------------------
pin1 in+ node3
pin2 in- node4
pin3 VDD node6
pin4 VSS node2
pin5 out node1
pin6 shut_dn_n node5
Usually we do not do S-parameter simulation for an opam since it is used in low frequency applications. Instead, AC simulation is enough to get all the results you need.
I modified your ads file, both S-parameter and AC simulations are running OK.
Added after 3 minutes:
sorry, miss the attachment