After running a while, i am getting connection error !

[Mushfique]

Hello @all,

Recently i was having an issue while running RF scripts.

I am getting below error after running a while. 

MaxRetryError: HTTPConnectionPool(host='localhost', port=54835): Max retries exceeded with url: /session/f557c20127a3a5a1b8751a91803286a4/window (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x04B36710>: Failed to establish a new connection: [Errno 10061] No connection could be made because the target machine actively refused it',))

But even two weeks earlier, all the scripts are running properly.

Anyone could help me to resolve this issue!

BR,

Mushfiqur.