.net core reddis connection

having issues to connect externally and internally with ,net core to redis service on render.

cannot get it working only timeouts

nugget: Microsoft.Extensions.Caching.StackExchangeRedis

StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection beca
me available (10000ms) - Last Connection Exception: SocketClosed on

I tried with the other lib also, same:

StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s). Error connecting right now. To allow this multiplexer to continue retrying until it’s able to connect, use abortConnect=false in your connection string or AbortOnConnectFail=false; in your code.