ConnectionMultiplexer exception caused when trying to invoke webAPI endpoints -

Question

I am facing an exception(ConnectionMultiplexer) message when trying to access a .NetCore 8 webAPI endpoint. I tried to use repositoryPattern in my project so there's a GenericRepository interface. I registered my dependencies in a separate class and then added it to my Program.cs class using Services.Add().Let me post the relevant pieces of code so that the structure is understandable to you. There's a whole lot of inter-related code so pls bear with me and pardon me if it appears too verbose.

**** I have removed the unrelated code and edited my question for the sake of brevity and clarity.

The StackExchange.Redis exception I am getting is

HirectStore.API.Infrastructure.Services.ResponseCacheService.GetCachedResponseAsync(String cacheKey) in D:\Code Stack\Projects\HirectStore\HirectStoreBackend\HirectStore.API\Infrastructure\Services\ResponseCacheService.cs:line 35\r\n

In my Program.cs -

builder.Services.AddSingleton<IConnectionMultiplexer>(c =>
{
    var multiplexerconfig = ConfigurationOptions.Parse("localhost, abortConnect=false");
    return ConnectionMultiplexer.Connect(multiplexerconfig);

});
builder.Services.AddApplicationServices();

I inspected the exception in my ExceptionMiddleware class and it says the following -

'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.'

This is how I registered the dependencies of ResponseCache -

public static IServiceCollection AddApplicationServices(this IServiceCollection services)
{
    services.AddSingleton<IResponseCacheService, ResponseCacheService>();
    return services;
}

IResponseCacheService.cs -

public interface IResponseCacheService
{
    Task CacheResponseAsync(string cacheKey, object response, TimeSpan timeToLive);
    Task<string> GetCachedResponseAsync(string cacheKey);
}

and it's implementation -

public class ResponseCacheService:IResponseCacheService
{
    private readonly IDatabase _database;

    public ResponseCacheService(IConnectionMultiplexer redis)
    {
        _database = redis.GetDatabase();
    }

    public async Task CacheResponseAsync(string cacheKey, object response, TimeSpan timeToLive)
    {
        if (response == null)
        {
            return;
        };
        var options = new JsonSerializerOptions
        {
            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
        };

        var serialisedResponse = JsonSerializer.Serialize(response, options);

        await _database.StringSetAsync(cacheKey, serialisedResponse, timeToLive);

    }

    public async Task<string> GetCachedResponseAsync(string cacheKey)
    {
    ***exception here***    
    var cachedResponse = await _database.StringGetAsync(cacheKey);

        if (cachedResponse.IsNullOrEmpty)
        {
            return null;
        }
        return cachedResponse;

    }
}

So where's the twist? What is this exception actually trying to convey? In all the code I posted, what exactly is causing the above exception? I am not really sure about the purpose of the ConnectionMultiplexer, I followed it from a tutorial. Even that tutorial didn't provide a thorough explanation. How should I remove this exception and get my webAPI working? Need your kind assistance on this.

Thanks,