Negotiate end point connection error

[sharvaridesai123]

I am getting an error on the negotiate endpoint related to the connection.
The actual error is Connection string missing required properties endpoint. (Parameter 'connectionString')

I am using BidirectionalChat example and using isolated process. My code works locally, but not when deployed to function app.

[Function("negotiate")] public async Task<SignalRConnectionInfo> Negotiate([HttpTrigger(AuthorizationLevel.Anonymous, "get")] HttpRequestData req, [SignalRConnectionInfoInput(HubName = "Events", UserId = "{query.personId}", ConnectionStringSetting = "xxxx_SignalRConnection")] SignalRConnectionInfo signalRConnectionInfo) { _logger.LogInformation("Executing Negotiate for SignalR."); return signalRConnectionInfo; }
I have added xxxx_SignalRConnection to the Configuration ApplicationSettings. I don't know what is missing. It appears that it cannot find the connectionstring