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---
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layout: post
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title: Installation Errors in Blazor - Syncfusion
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description: Learn here about the common installation errorsand solution to those errors in Syncfusion Blazor Components installation.
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title: Common installation errors in Blazor | Syncfusion
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description: Understand common Syncfusion Blazor installer errors, their causes, and solutions including unlock key issues, license expiration, concurrent installers.
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platform: Blazor
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component: Common
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control: Common
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documentation: ug
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---
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# Common Installation Errors
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# Common installation errors
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This article describes the most common installation errors, as well as the causes and solutions to those errors.
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**Error Message:** Sorry, the provided unlock key is a trial unlock key and cannot be used to unlock the licensed version of our Essential Studio<supstyle="font-size:70%">®</sup> for Blazor installer.

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**Reason** <br/> You are attempting to use a Trial unlock key to unlock the licensed installer.
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**Reason:** <br/> A trial unlock key is being used with the licensed installer.
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**Suggested solution** <br /> Only a licensed unlock key can unlock a licensed installer. So, to unlock the Licensed installer, use the Licensed unlock key. To generate the licensed unlock key, refer to [this](https://support.syncfusion.com/kb/article/2757/how-to-generate-syncfusion-setup-unlock-key-from-syncfusion-support-account) article.
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**Suggested solution:** Only a licensed unlock key can unlock a licensed installer. So, to unlock the Licensed installer, use the Licensed unlock key. To generate the licensed unlock key, refer to [this](https://support.syncfusion.com/kb/article/2757/how-to-generate-syncfusion-setup-unlock-key-from-syncfusion-support-account) article.
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## License has expired
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**Error Message:** Your license for Syncfusion<supstyle="font-size:70%">®</sup> Essential Studio<supstyle="font-size:70%">®</sup> for Blazor has been expired since {date}. Renew your subscription and try again.
**Error Message:** Sorry, we are unable to find a valid license or trial for Essential Studio<supstyle="font-size:70%">®</sup> for Blazor under your account.
## Unable to install because of another installation
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**Error Message:** Another installation is in progress. You cannot start this installation without completing all other currently active installations. Click cancel to end this installer or retry to attempt after currently active installation completed to install again.
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**Reason:** You are trying to install when another installation is already running in your machine.
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**Reason**<br /> You are trying to install when another installation is already running in your machine.
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**Suggested solution:**Open and kill the msiexec process in the task manager and then continue to install Syncfusion. If the problem is still present, restart the computer and try Syncfusion<supstyle="font-size:70%">®</sup> installer.
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**Suggested solution** <br /> Open and kill the msiexec process in the task manager and then continue to install Syncfusion. If the problem is still present, restart the computer and try Syncfusion<supstyle="font-size:70%">®</sup> installer.

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## Unable to install due to controlled folder access
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***Offline***
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**Error Message:** Controlled folder access seems to be enabled in your machine. The provided install or samples location (e.g., Public Documents) is protected by the controlled folder access settings.
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**Error Message:** Controlled folder access seems to be enabled on this machine. The provided install or samples location (for example, Public Documents) is protected by controlled folder access settings.
**Error Message:** Controlled folder access seems to be enabled in your machine. The provided install, samples, or download location (e.g., Public Documents) is protected by the controlled folder access settings.
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**Error Message:** Controlled folder access seems to be enabled on this machine. The provided install, samples, or download location (for example, Public Documents) is protected by controlled folder access settings.
**Reason** <br /> You have enabled controlled folder access settings on your computer.
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**Reason:** You have enabled controlled folder access settings on your computer.
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***Suggested solution***
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**Suggested solution:**
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**Suggestion 1:**
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*We will ship our demos in the public documents folder by default.
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*Syncfusion demos are installed to the Public Documents folder by default.
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* You have controlled folder access enabled on your machine, so our demos cannot be installed in the documents folder. If you need to install our demos in the Documents folder, follow the steps in this [link](https://support.microsoft.com/en-us/windows/allow-an-app-to-access-controlled-folders-b5b6627a-b008-2ca2-7931-7e51e912b034) and disable the controlled folder access.
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* You can enable this option after the installing our Syncfusion<supstyle="font-size:70%">®</sup> setup.
description: Learn here about how to install Syncfusion Blazor NuGet packages using the Package Manager UI, .NET CLI, and Package Manager Console. Explore to more details.

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As an alternative, after opening the Blazor application in Visual Studio, go to the **Tools** menu and after hovering **NuGet Package Manager**, select **Manage NuGet Packages for Solution...**
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2. The Manage NuGet Packages window will open. Navigate to the **Browse** tab, then search for the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages using a term like **"Syncfusion<supstyle="font-size:70%">®</sup> Blazor"** and select the appropriate Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet package for your development.
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N> The [nuget.org](https://api.nuget.org/v3/index.json) package source is selected by default in the Package source drop-down. If your Visual Studio does not have nuget.org configured, follow the instructions in the [Microsoft documents](https://learn.microsoft.com/en-us/nuget/consume-packages/install-use-packages-visual-studio#package-sources) to set up the nuget.org feed URL.
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N> The [nuget.org](https://api.nuget.org/v3/index.json) package source is selected by default. If Visual Studio does not have nuget.org configured, follow the instructions in the [Microsoft documents](https://learn.microsoft.com/en-us/nuget/consume-packages/install-use-packages-visual-studio#package-sources) to set up the nuget.org feed URL.

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3. When you select a Blazor package, the right side panel will provide more information about it.
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4. By default, the package is selected with the latest version. You can choose the required version and click the **Install** button and accept the license terms. The package will be added to your Blazor application.

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5. At this point, your application has all the required Syncfusion<supstyle="font-size:70%">®</sup> assemblies, and you will be ready to start building high-performance, responsive app with [Syncfusion<supstyle="font-size:70%">®</sup> Blazor components](https://www.syncfusion.com/blazor-components). Also, you can refer to the [Blazor help document](https://blazor.syncfusion.com/documentation/introduction) for development.
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## Installation using Dotnet (.NET) CLI
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The [dotnet Command Line Interface (CLI)](https://learn.microsoft.com/en-us/nuget/consume-packages/install-use-packages-dotnet-cli), allows you to add, restore, pack, publish, and manage packages without making any changes to your application files. [Dotnet add package](https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-add-package?tabs=netcore2x) adds a package reference to the application file, then runs [dotnet restore](https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-restore?tabs=netcore2x) to install the package.
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The [dotnet Command Line Interface (CLI)]((https://learn.microsoft.com/en-us/nuget/consume-packages/install-use-packages-dotnet-cli)) lets you add, restore, pack, publish, and manage packages without making any changes to your application files. [Dotnet add package](https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-add-package?tabs=netcore2x) adds a package reference to the application file, then runs [dotnet restore](https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-restore?tabs=netcore2x) to install the package.
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Follow the below instructions to use the dotnet CLI command to install the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages.
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1. To show the Package Manager Console, open your Blazor application in Visual Studio and navigate to **Tools -> NuGet Package Manager -> Package Manager Console**.
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2. The **Package Manager Console** will be shown at the bottom of the screen. You can install the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages by entering the following NuGet installation commands.
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N> You can find the list of Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages which are published in nuget.org from [here](https://www.nuget.org/packages?q=Tags%3A%22Blazor%22+syncfusion)
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N> Browse Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages on [NuGet.org](https://www.nuget.org/packages?q=Tags%3A%22Blazor%22+syncfusion).
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***Install specified Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet package in specified Blazor application***
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The following command will install the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet package in the given Blazor application.
3. By default, the package will be installed with latest version. You can give the required version with the -Version term like below to install the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet packages in the appropriate version.
4. The NuGet package manager console will install the Syncfusion<supstyle="font-size:70%">®</sup> Blazor NuGet package as well as the dependencies it has. When the installation is complete, the console will show that your Syncfusion<supstyle="font-size:70%">®</sup> Blazor package has been successfully added to the application.
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