azure function visual studio Error Autofac.Extras.CommonServiceLocator

I'm building a new project of azure function in visual studio. target .net framework (v1) because i reference .net framework project.

Is there a binding issue in azure functions?

I reference my own dll and in that dll i reference nhibernate (5.0.3) nuget package and fluent nhibernate package(2.1.0). When i the code on runtime is build my unit of work i'm getting

FluentNHibernate.Cfg.FluentConfigurationException


HResult=0x80131500
  Message=An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.




Source=FluentNHibernate
  StackTrace:
   at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()
   at Cloudents.Infrastructure.Framework.Database.UnitOfWorkFactory..ctor(String connectionString) in C:\Users\Ram\source\repos\Zbox\Cloudents.Infrastructure.Framework\Database\UnitOfWorkFactory.cs:line 15

Inner Exception 1:
FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.



Inner Exception 2:
SerializationException: Unable to find assembly 'FluentNHibernate, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null'.

I'm not sure why the code is trying to get assembly version that i dont have. i tried to put automatic binding but no luck. I tried to upload my code to azure but same error.

Any help how to solve this? I'm using the same code in azure web job and the code works.