2475103 - RSOE log shows OEE1057 error code - SMP 3.0

RSOE log shows:

OEE1057: Failed connecting to backend server because of [MLC63: Unable to connect a socket. Network Error: No connection could be made because the target machine actively refused it. (winsock error code: 10061).] D{r:\src\db\relayserver\c\oe_impl.c:1197}
"An HTTP chunk received from the Relay Server is missing a trailing CRLF"
<UpChannel-0000> networkRead: encountered a socket error errCode: 201, sysCode: 0
<UpChannel-0000> doHTTPRequest: read reply failed
<UpChannel-0000> Terminating..
<DnChannel-0000> Ready to establish down channel
<DnChannel-0000> Sending down channel connect packet..
<DnChannel-0000> doHTTPRequest: sending POST request..
<DnChannel-0000> parseHTTP(): HTTP status received: 404
<DnChannel-0000> Received an unexpected HTTP error from the web server:HTTP/1.1 404 Page not found

When testing the Relay Server (with SMP 3.0 OData Runtime) through its URL it shows:
Overall Availability: None

RS log shows:

RSE3009: Communication error [SYS1229: An operation was attempted on a nonexistent network connection...] occurred while writing to up channel of backend server 'BackendServerName' in backend farm 'BackendServerFarmID'
RSE4003: Client of backend server 'BackendServerName' in backend farm 'BackendServerFarmID' timed out waiting for backend server response after 480 seconds

• SAP Relay Server (RS)
• SAP Relay Server Outbound Enabler (RSOE)
• SAP Mobile Platform (SMP) 3.0 OData Runtime

smp, sap mobile platform, relay server, rs, rsoe, outbound enabler, port, overall availability none, RSE3009, RSE4003, OEE1057, MLC63, 10061, HTTP 404, SocketException: Connection reset by peer: socket write error, ClientAbortException: null , KBA , BC-SYB-RS , Relay Server , Problem