I see that your WSDL is RPC.
Please check this link for more information on RPC https://help.sap.com/saphelp_nwesrce/helpdata/en/43/ce993b45cb0a85e10000000a1553f6/frameset.htm
It does say that though SAP expects a document style, it can convert RPC to a document style with the restriction on usage of Array types.
I see Array is being used in the Method1 response. Changing it should work.
Thanks,
Anna