出现这种问题主要是由于认证密钥在生产环境中没有正确配置或者声明。为了解决此问题，我们需要确保在应用程序的启动文件（即Startup.cs）中正确配置JWT认证密钥，并引用相关的命名空间。

一般来说，我们需要在CreateHostBuilder方法中配置JWT认证，如下所示：

public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); }) .ConfigureAppConfiguration((hostingContext, config) => { var environmentName = hostingContext.HostingEnvironment.EnvironmentName;

        config.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
        config.AddJsonFile($"appsettings.{environmentName}.json", optional: true, reloadOnChange: true);

        config.AddEnvironmentVariables();
    })
    .ConfigureServices((hostContext, services) =>
    {
        var jwtSettings = new JwtSettings();

        hostContext.Configuration.Bind("JwtSettings", jwtSettings);

        services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
            .AddJwtBearer(options =>
            {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(jwtSettings.Secret)),
                    ValidateIssuer = false,
                    ValidateAudience = false,
                    RequireExpirationTime = false,
                    ValidateLifetime = true
                };
            });

        services.AddSingleton(jwtSettings);
        services.AddControllers();
    });

在JWT认证配置中，我们需要确保正确配置了认证密钥，并且设置了必要的验证选项。这样，我们就能够在生产环境中成功验证JWT令牌了。