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Troubleshooting the Dispel VPN Client Application

This guide covers the most common troubleshooting scenarios related to the Dispel VPN Client Application.

Maya Shah avatar
Written by Maya Shah
Updated over a week ago

First Time Installation Tips

Please ensure the below is true on your local machine prior to installing the Dispel VPN Client Application.

  • Completely uninstall previous Dispel Nigma client app

  • Uninstall OpenVPN unless you use it as a regular personal VPN client

  • Ensure PC can install apps from trusted sources. (Settings -> Update and Security -> For developers)

  • Ensure Powershell can run remote signed scripts (Settings -> Update and Security -> For developers -> Powershell)

Error: "VPN Drivers Could Not Be Installed"

Cause

The root cause of this issue tends to be that your TAP adapter is not enabled, or that you are simultaneously using another application that uses OpenVPN. Therefore, the Dispel Application would not be able to launch.

Solution (Windows)

  1. On your Local Machine, search for and open up the Control Panel.

  2. Select "Network and Internet", and then select "Network and Sharing Center".

  3. Select “Change Adapter settings” in left menu.

    • The "Local Area Connection" should say "TAP-Windows Adapter V9".

      • If it is grayed out, you need to enable it by right-clicking on this an enabling.

        • Restart the app and start it again

      • If you do not see this at all, you will need to run installer as an admin in Powershell:

        • Search for Powershell on your local machine, right-click, and open it as an admin

        • In the Powershell terminal, run these two commands separately:

          • cd "C:\\Program Files\\Dispel\\DispelVPNService\\Tap-Windows\\bin"

          • .\\InstallDriver.ps1

        • Restart the app and start it again

      • If there are multiple adapters listed, you are using other applications that also use OpenVPN.

        • Right-click and disable them

        • Restart the app and start it again

Error: Application Failed to Install

Cause

There is often a lingering VPN service or program interfering with the new install. The steps below walk through a proper clean-up.

Solution (Windows)

  1. Close the Installer.

  2. Search for Powershell on your local machine, right-click, and open as an administrator.

    1. In the Powershell terminal, manually stop the Windows Dispel-Daemon service by running this command: sc.exe stop DispelVPNService

    2. Delete the service by running this command: sc.exe delete DispelVPNService

    3. Delete the Dispel file by running delete C:\Program Files\Dispel

  3. Check installed programs to make sure there are not other versions of the Dispel client installed. If there are, uninstall them.

    • Run this command to see if there are lingering versions: Get-AppxPackage -AllUsers -Name "Dispel*"

      • If you do not see 0 results, then you have lingering versions.

    • You can delete these extra packages by running this command in the same elevated Powershell shell: Remove-AppxPackage -AllUsers -Package "[PackageFullName from previous result]"

  4. Re-download the installer and run it again.

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