[Solved] ASP.Net Error: A fatal alert was received from the remote endpoint

Hello,

I have developed an ASP.NET application using C# .I'm using the Identity for user authentication. I am facing a problem that I can't find the solution. While a user is working (random user not a particular) the application logs him out and then when he tries to re-login, he gets redirected again to login page (like he has no access to the page) even though he has access to the page. If I republish the project it works for a while and then a user is logged out again. I have several applications running with the same template and it's the first time I am facing this issue. I am managing the access level of each user with the following code in web.config. 

<configuration>
  <system.web>
    <authorization>
      <allow roles="Administrator"/>
      <allow roles="User"/> 
      <deny users="*"/>
    </authorization>
  </system.web>
</configuration> 

On System I found that I get this error a lot A fatal alert was received from the remote endpoint. The TLS protocol defined fatal alert code is 70. I checked for solutions but I already have TLS protocols checked on both server/client settings.