After version upgrade from 8.0 to 8.1.3 , getting error for missing object reference in web designer module

Hi,

We upgraded the one identity manager from 8.0 to 8.1.3 and getting error in custom module of password web portal.

Post upgrade we are getting below error-

Error code: CS0120; Error description: ccc_Test.cs(1238,13): An object reference is required for the non-static field, method, or property 'VI.WebRuntime.ServiceConnection.Get()' (CS0120); Node: ; Property: ; Module: ccc_Test; Project name: QER_PasswordWeb; Compiler: CSharp

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Customization is in password query as it was requirement to have 3 password queries for users to reset password from password reset portal. So we are storing them in customeproperty01 to coutomeproperty6(3 queries and 3 ans).

We have defined the pre-defined sql queried in designer to fetch these queries and answer. Theses pre-defined sql queries are getting called in code literal as below-

var vars = _UserSession.SessionModule.TableStore.GetTable("SessionVar");
var accountName = vars.GetColumn("AccountName").GetValue(vars.First()).String;
var numb = vars.GetColumn("num").GetValue(vars.First()).String;
if(numb=="1")
{
var q = await VI.WebRuntime.ServiceConnection.Get().Session.GetLimitedSqlScalarAsync<string>("CCC_Person_GetPasswordQuery1", new []{ new QueryParameter("CentralAccount", ValType.String, accountName)}, _cx).ConfigureAwait(false);
vars.GetColumn("PasswordQuery").SetValue(vars.First(), q);
}