Error on Calculation of working days in business processes user task - Add Business Days

I have the add-in loaded, Calculation of working days in business processes.

Trying to use the "Add Business Days" user task.

Calendar is set, number of days is set, start date is set, end date is empty.  When processing, it throws an error:

Npgsql.PostgresException (0x80004005): 42883: operator does not exist: boolean = integer

   at Npgsql.NpgsqlConnector.d__157.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Npgsql.NpgsqlConnector.d__156.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at Npgsql.NpgsqlConnector.d__156.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Npgsql.NpgsqlConnector.d__163`1.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at Npgsql.NpgsqlDataReader.d__32.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Npgsql.NpgsqlDataReader.NextResult()

   at Npgsql.NpgsqlCommand.d__71.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Npgsql.NpgsqlCommand.d__92.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Npgsql.NpgsqlCommand.ExecuteDbDataReader(CommandBehavior behavior)

   at Polly.Policy.<>c__DisplayClass119_0`1.b__0(Context ctx, CancellationToken ct)

   at Polly.Policy.<>c__DisplayClass129_0`1.b__0(Context ctx, CancellationToken ct)

   at Polly.Policy.<>c__DisplayClass103_0.b__1(Context ctx, CancellationToken ct)

   at Polly.NoOp.NoOpEngine.Implementation[TResult](Func`3 action, Context context, CancellationToken cancellationToken)

   at Polly.Policy.<>c.b__103_0(Action`2 action, Context context, CancellationToken cancellationToken)

   at Polly.Policy.ExecuteInternal[TResult](Func`3 action, Context context, CancellationToken cancellationToken)

   at Polly.Policy.Execute[TResult](Func`3 action, Context context, CancellationToken cancellationToken)

   at Polly.Policy.Execute[TResult](Func`1 action)

   at Terrasoft.Core.DB.DBExecutor.FailoverExecuteReader(DbCommand command, Func`1 func)

   at Terrasoft.Core.DB.DBExecutor.d__88`1.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Terrasoft.Core.DB.DBExecutor.ExecuteCommand[TResult](Func`2 commandExecutionCallback, String sqlText, QueryParameterCollection queryParameters, CancellationToken cancellationToken)

   at Terrasoft.Core.DB.DBExecutor.InternalExecuteReader(String sqlText, QueryParameterCollection queryParameters, CommandBehavior behavior, CancellationToken cancellationToken)

   at Terrasoft.DB.PostgreSql.PostgreSqlExecutor.<>c__DisplayClass41_0.b__0()

   at Terrasoft.DB.PostgreSql.PostgreSqlExecutor.ExecuteInLockIfInTransaction[TResult](Func`1 action)

   at Terrasoft.DB.PostgreSql.PostgreSqlExecutor.InternalExecuteReader(String sqlText, QueryParameterCollection queryParameters, CommandBehavior behavior, CancellationToken cancellationToken)

   at Terrasoft.Core.DB.DBExecutor.InternalExecuteReader(String sqlText, QueryParameterCollection queryParameters)

   at Terrasoft.Core.DB.Select.d__54.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Terrasoft.Core.DB.Select.ExecuteReader(DBExecutor dbExecutor)

   at Terrasoft.Configuration.GlbCalendarServiceUtils.GetWeekEnds()

   at Terrasoft.Configuration.GlbCalendarServiceUtils.AddWorkingDays(DateTime date, Int32 days, Guid incomingCalendarId)

   at Terrasoft.Core.Process.Configuration.GlbAddBusinessDays.InternalExecute(ProcessExecutingContext context)

   at Terrasoft.Core.Process.ProcessActivity.ExecuteElement(ProcessExecutingContext context)

   at Terrasoft.Core.Process.ProcessActivity.ExecuteItem(ProcessExecutingContext context)

   at Terrasoft.Core.Process.ProcessFlowElement.Execute(ProcessExecutingContext context)