Issues with WebView2: Runtime is installed, but applications do not see it and do not work.

Question

Issues with WebView2: Runtime is installed, but applications do not see it and do not work.

renakos 20

Hello everyone,

I encountered problems with WebView2 Runtime. I tried reinstalling WebView2, it didn't help. Installing with administrator rights didn't help. I tried Evergreen Bootstrapper and Standalone Installer. Before the problem appeared, I uninstalled MS Edge. However, neither installing Edge nor WebView2 helped.

Windows 11 Home

06/15/2023

22635.4950

Windows Component Interface Pack 1000.22700.1077.0

Viorel 122.6K Reputation points

2025-03-16T11:38:24.0666667+00:00

(Removed).
renakos 20 Reputation points

2025-03-16T12:30:19.2866667+00:00

The app says "Couldn't find a compatible Webview2 Runtime installation to host WebViews."

I tried building an app with WebView2 usage but it also didn't work
Viorel 122.6K Reputation points

2025-03-16T12:46:45.9366667+00:00

(Removed).
renakos 20 Reputation points

2025-03-16T14:47:10.2866667+00:00

Unfortunately, it did not solve the problem. Should I send event viewer logs before the problem has started?
Anonymous

2025-03-17T02:50:32.5+00:00

Hi @renakos ,

Could you please tell us under which circumstance you have encountered this issue? Are you trying to run a custom WebView2 app?
renakos 20 Reputation points

2025-03-17T07:50:57.83+00:00

The error appears while running any app that uses WebView2. For example, i try to run an application that uses WebView2 to show me a Monaco editor. The app either crashes with FileNotFoundException or says "Couldn't find a compatible Webview2 Runtime installation to host WebViews."

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Viorel 122.6K Reputation points

2025-03-16T11:38:24.0666667+00:00

(Removed).
renakos 20 Reputation points

2025-03-16T12:30:19.2866667+00:00

The app says "Couldn't find a compatible Webview2 Runtime installation to host WebViews."

I tried building an app with WebView2 usage but it also didn't work
Viorel 122.6K Reputation points

2025-03-16T12:46:45.9366667+00:00

(Removed).
renakos 20 Reputation points

2025-03-16T14:47:10.2866667+00:00

Unfortunately, it did not solve the problem. Should I send event viewer logs before the problem has started?
Anonymous

2025-03-17T02:50:32.5+00:00

Hi @renakos ,

Could you please tell us under which circumstance you have encountered this issue? Are you trying to run a custom WebView2 app?
renakos 20 Reputation points

2025-03-17T07:50:57.83+00:00

The error appears while running any app that uses WebView2. For example, i try to run an application that uses WebView2 to show me a Monaco editor. The app either crashes with FileNotFoundException or says "Couldn't find a compatible Webview2 Runtime installation to host WebViews."

Answer 1

Anonymous

Hi @renakos ,

Please consider upgrading your Nuget package version to become compatible with your WebView2 Runtime version. You can simply upgrade both Nuget package and WebView2 Runtime to the latest version for a test.

UPDATE

I could only reproduce this issue when I set WEBVIEW2_BROWSER_EXECUTABLE_FOLDER in System variables. Please check your System variables and delete

WEBVIEW2_BROWSER_EXECUTABLE_FOLDER if any. You can directly search "Edit the system environment variables" to access the system variables settings.

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Best Regards,

Shijie Li

renakos 20 Reputation points

2025-03-17T08:29:58.16+00:00

Microsoft.Web.WebView2.Core.WebView2RuntimeNotFoundException: "Couldn't find a compatible Webview2 Runtime installation to host WebViews."

Inner exception

FileNotFoundException: Не удается найти указанный файл. (HRESULT: 0x80070002)

Unfortunately, it did not solve the problem. MS Edge and WebView2 versions:

134.0.3124.68

NuGet package version:

1.0.3124.44
Anonymous

2025-03-17T08:43:49.5933333+00:00

Hi @renakos ,

Are you specifying any fixed version runtime in your code? Could you please show us if so?

renakos 20

I do not specify fixed version runtime.

partial class Form1
{
    /// <summary>
    /// Обязательная переменная конструктора.
    /// </summary>
    private System.ComponentModel.IContainer components = null;
    // Компонент WebView2
    private Microsoft.Web.WebView2.WinForms.WebView2 webView21;
    /// <summary>
    /// Освободить все используемые ресурсы.
    /// </summary>
    /// <param name="disposing">истинно, если управляемый ресурс должен быть удалён; иначе ложно.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }
    #region Код, автоматически созданный конструктором форм Windows
    /// <summary>
    /// Требуемый метод для поддержки конструктора — не изменяйте 
    /// содержимое этого метода с помощью редактора кода.
    /// </summary>
    private void InitializeComponent()
    {
        this.webView21 = new Microsoft.Web.WebView2.WinForms.WebView2();
        ((System.ComponentModel.ISupportInitialize)(this.webView21)).BeginInit();
        this.SuspendLayout();
        /// 
        /// webView21
        /// 
        this.webView21.CreationProperties = null;
        this.webView21.DefaultBackgroundColor = System.Drawing.Color.White;
        this.webView21.Dock = System.Windows.Forms.DockStyle.Fill;
        this.webView21.Location = new System.Drawing.Point(0, 0);
        this.webView21.Name = "webView21";
        this.webView21.Size = new System.Drawing.Size(800, 450);
        this.webView21.TabIndex = 0;
        this.webView21.ZoomFactor = 1D;
        /// 
        /// Form1
        /// 
        this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(800, 450);
        this.Controls.Add(this.webView21);
        this.Name = "Form1";
        this.Text = "WebView2 Test App";
        this.Load += new System.EventHandler(this.Form1_Load);
        ((System.ComponentModel.ISupportInitialize)(this.webView21)).EndInit();
        this.ResumeLayout(false);
    }
    #endregion
}

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    private async void Form1_Load(object sender, EventArgs e)
    {
        await webView21.EnsureCoreWebView2Async(null); //<-- FileNotFoundException
        webView21.CoreWebView2.Navigate("https://www.google.com");
    }
}

Anonymous

2025-03-18T03:12:55.4266667+00:00

Hi @renakos ,

Thank you for your code. Please see my updated answer.
renakos 20 Reputation points

2025-03-18T15:30:18.4133333+00:00

Thank you so much! It solved my issues!

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Issues with WebView2: Runtime is installed, but applications do not see it and do not work.

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