HttpError: Resource not accessible by integration

StackExchange.Redis.RedisConnectionException : The message timed out in the backlog attempting to send because no connection became available (400ms) - Last Connection Exception: UnableToConnect on 127.0.0.1:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 0s ago, last-write: 0s ago, keep-alive: 400s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 1s ago, v: 2.7.3.35324, command=PING, timeout: 400, inst: 0, qu: 1, qs: 0, aw: False, bw: Inactive, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: 127.0.0.1:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: fv-az583-58(SE.Redis-v2.7.3.35324), IOCP: (Busy=0,Free=1000,Min=2,Max=1000), WORKER: (Busy=3,Free=32764,Min=2,Max=32767), POOL: (Threads=4,QueuedItems=11,CompletedItems=424,Timers=52), v: 2.7.3.35324 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---- StackExchange.Redis.RedisConnectionException : UnableToConnect on 127.0.0.1:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 0s ago, last-write: 0s ago, keep-alive: 400s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 1s ago, v: 2.7.3.35324

Process completed with exit code 1.

HttpError: Resource not accessible by integration

Assert.NotNull() Failure: Value is null