System.ServiceModel.EndpointNotFoundException: in CRM 2013 on premises

Hi All,

We have CRM 2013 on premises. we observed in application server event viewer we are receiving below warning error. what causing this issue.

A Sandbox Host is not available.
Source: w3wp.exe (6312)
Sandbox Host: CRMAPPSERVER
Reason: System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at net.tcp://CRMAPPSERVER/CrmSandboxHost that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.

let me know if you required more information.

Thanks,

Dhaval