Plugin uninstall then install problem in nopCommerce 4.20

I tried to install motion theme and other plugins related to that theme. But after installing those plugins nopCommerce asked to reboot the application .. so I did that.. During rebooting after few minutes it shows error... unable to start application. This problem I am getting in both local machine and hosted server. I noticed in my plugins.json file it is adding some extra data like: pluginToUninstall[....]... pluginToDelete[....] (Approximately). nopCommerce team help me out with this problem....

can you please share your error log so we know where is the problem?
or please share some detail about this error

Again I tried to uninstall one plugin. Then I restarted the application. During reboot visual studio stopped. Now my plugins.json looks like this :

{
  "InstalledPluginNames": [
    "DiscountRequirement.MustBeAssignedToCustomerRole",
    "CurrencyExchange.ECB",
    "Misc.SendinBlue",
    "Payments.CheckMoneyOrder",
    "Payments.Manual",
    "Payments.PayPalStandard",
    "Payments.Qualpay",
    "Payments.Square",
    "Pickup.PickupInStore",
    "Shipping.FixedByWeightByTotal",
    "Shipping.UPS",
    "Tax.Avalara",
    "Tax.FixedOrByCountryStateZip",
    "Widgets.GoogleAnalytics",
    "Widgets.NivoSlider",
    "ExternalAuth.Facebook",
    "Misc.SolrOverride",
    "SevenSpikes.Core",
    "SevenSpikes.Nop.Plugins.AjaxFilters",
    "SevenSpikes.Nop.Plugins.AnywhereSliders",
    "SevenSpikes.Nop.Plugins.CloudZoom",
    "SevenSpikes.Nop.Plugins.FacebookShop",
    "SevenSpikes.Nop.Plugins.InstantSearch",
    "SevenSpikes.Nop.Plugins.JCarousel",
    "SevenSpikes.Nop.Plugins.MegaMenu",
    "SevenSpikes.Nop.Plugins.NopQuickTabs",
    "SevenSpikes.Nop.Plugins.ProductRibbons",
    "SevenSpikes.Nop.Plugins.QuickView",
    "SevenSpikes.Theme.Motion"
  ],
  "PluginNamesToUninstall": [
    "SevenSpikes.Nop.Plugins.CloudZoom"
  ],
  "PluginNamesToDelete": [],
  "PluginNamesToInstall": []
}

These lines added : ,
  "PluginNamesToUninstall": [
    "SevenSpikes.Nop.Plugins.CloudZoom"
  ],
  "PluginNamesToDelete": [],
  "PluginNamesToInstall": []


Now in Admin --> Local plugins... It looks like that plugin did not uninstall.
Again it is showing uninstall option for that plugin

Now I tried to install that plugin. And I got this Error in



An error occurred while starting the application.
NullReferenceException: Object reference not set to an instance of an object.

Microsoft.AspNetCore.Authentication.AuthenticationHttpContextExtensions.AuthenticateAsync(HttpContext context, string scheme)

    NullReferenceException: Object reference not set to an instance of an object.
        Microsoft.AspNetCore.Authentication.AuthenticationHttpContextExtensions.AuthenticateAsync(HttpContext context, string scheme)
        Nop.Services.Authentication.CookieAuthenticationService.GetAuthenticatedCustomer() in CookieAuthenticationService.cs

                var authenticateResult = _httpContextAccessor.HttpContext.AuthenticateAsync(NopAuthenticationDefaults.AuthenticationScheme).Result;

Nop.Web.Framework.WebWorkContext.get_CurrentCustomer() in WebWorkContext.cs

                        customer = _authenticationService.GetAuthenticatedCustomer();

Nop.Web.Framework.WebWorkContext.get_WorkingLanguage() in WebWorkContext.cs

                    var customerLanguageId = _genericAttributeService.GetAttribute<int>(CurrentCustomer,

Nop.Services.Localization.LocalizationService.GetResource(string resourceKey) in LocalizationService.cs

                if (_workContext.WorkingLanguage != null)

Nop.Services.Plugins.PluginService.InstallPlugins() in PluginService.cs

                        var message = string.Format(localizationService.GetResource("Admin.Plugins.Errors.NotInstalled"), descriptor.SystemName);

Nop.Web.Framework.Infrastructure.Extensions.ServiceCollectionExtensions.ConfigureApplicationServices(IServiceCollection services, IConfiguration configuration, IHostingEnvironment hostingEnvironment) in ServiceCollectionExtensions.cs

                engine.Resolve<IPluginService>().InstallPlugins();

Nop.Web.Startup.ConfigureServices(IServiceCollection services) in Startup.cs

                    return services.ConfigureApplicationServices(_configuration, _hostingEnvironment);
    Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)
    Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
    Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize()
    Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()


.NET Core 4.6.27110.04 X64 v4.0.0.0    |   Microsoft.AspNetCore.Hosting version 2.2.0-rtm-35687    |    Microsoft Windows 10.0.17134    |   Need help?



And my plugins.json looks like this :

{
  "InstalledPluginNames": [
    "DiscountRequirement.MustBeAssignedToCustomerRole",
    "CurrencyExchange.ECB",
    "Misc.SendinBlue",
    "Payments.CheckMoneyOrder",
    "Payments.Manual",
    "Payments.PayPalStandard",
    "Payments.Qualpay",
    "Payments.Square",
    "Pickup.PickupInStore",
    "Shipping.FixedByWeightByTotal",
    "Shipping.UPS",
    "Tax.Avalara",
    "Tax.FixedOrByCountryStateZip",
    "Widgets.GoogleAnalytics",
    "Widgets.NivoSlider",
    "ExternalAuth.Facebook",
    "Misc.SolrOverride",
    "SevenSpikes.Core",
    "SevenSpikes.Nop.Plugins.AjaxFilters",
    "SevenSpikes.Nop.Plugins.AnywhereSliders",
    "SevenSpikes.Nop.Plugins.FacebookShop",
    "SevenSpikes.Nop.Plugins.InstantSearch",
    "SevenSpikes.Nop.Plugins.JCarousel",
    "SevenSpikes.Nop.Plugins.MegaMenu",
    "SevenSpikes.Nop.Plugins.NopQuickTabs",
    "SevenSpikes.Nop.Plugins.ProductRibbons",
    "SevenSpikes.Nop.Plugins.QuickView",
    "SevenSpikes.Theme.Motion"
  ],
  "PluginNamesToUninstall": [],
  "PluginNamesToDelete": [],
  "PluginNamesToInstall": [
    {
      "Item1": "SevenSpikes.Nop.Plugins.CloudZoom",
      "Item2": "ced45d4c-72cb-4c4f-9d3d-80081d404d60"
    }
  ]
}

Did you manage to resolve this issue? I am getting the same issue in production

You need to remove the plugin by removing the Error Plugin in the file: ,
  "PluginNamesToUninstall": [
  ],
  "PluginNamesToDelete": [],
  "PluginNamesToInstall": []

Then you need to restart the application for the removal to complete. I also met the same problem as you.

Any solution? I have the same problem.. the solution is not the removal of plugin: plugin is mandatory for our site.

Thanks

I had this exact same problem, both on a staging server, as well as on my local dev machine.

I've fixed it locally but have as of yet done anything else with it (such as create a pull request or submit a bug for it with the resolution)

So - if you are able to compile with changes, then the issue is with method GetAuthenticatedCustomer in
Libraries\Nop.Services\Authentication\CookieAuthenticationService.cs

Line 101 is
            var authenticateResult = _httpContextAccessor.HttpContext.AuthenticateAsync(NopAuthenticationDefaults.AuthenticationScheme).Result;

But _httpContextAccessor.HttpContext is null at the point of plugin install in this case.

My first attempt (which worked) was to add the following lines immediately before the above line

  if (_httpContextAccessor.HttpContext == null)
            {
                return null;
            }

I solved the issue adding a backroud syste customer into Customer table. I suppose that during an upgrade from 3.9 to 4.2 something went wrong and we had this type of issue.
Adding manually a record for this user issue is solved!

Hi Massimo,
could you tell me what features the user should have?

Where do you enter it? directly from the DB?

thanks
marco

zrmax wrote: