Format exception message when apparing without configuration

scripts/controller

@@ -335,9 +335,14 @@ class ServerRunner(ZephirCommonController):
 
     @register_wamp('v1.config.configuration.server.updated', None, database=True)
     async def update_configuration(self, cursor, server_id):
-        configuration = await self.call('v1.config.configuration.server.get', server_id=server_id)
+        try:
+            configuration = await self.call('v1.config.configuration.server.get', server_id=server_id)
+        except:
+            print(f'No configuration available for server {server_id}')
+            return
         self.server.update_configuration(cursor, server_id, configuration['configuration'])
 
+
     @register_wamp('v1.server.peer-connection.update', notification_uri=None, database=True)
     async def update_peerconnection(self, cursor, serverid):
         try: