FMS does not accept Connection for 6 to 7 hours.

Hello

We are using FMS 2.0.5 for our application since from last two year.

Problem :-  Sometimes(With in a week or after 10 core disconnected from the edge ) our FMS are not able to accept  connection even at that time we can't enter into the admin(Management) Console. Some time after restart  our FMS accept connection and we can enter into the admin console. In the starting it takes less time to accept connection now as the times goes on time to accept connection is increasing. Suppose in December if it's takes 10 minutes to accept connection now it's taking 5 to 6 hours.

We have looked in the log files but we are not getting any error. We are getting core is no longer active and one error in admin panel related to "Assert failed "as shown below.

When we tried to check in services.msc  whether FMS services are working or not. We found FMS services works fine but we were not able to enter in the Management console. But after sometime we can say around after 5-6 hours it accept connection and we can enter in the Management console. We have tried from our side but don’t know what to do.

Please suggest us what should we do we are in very difficult situation.