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Sylatex
New Contributor II

Created on ‎04-08-2025 06:08 AM

Start FortiClient VPN ERROR JavaScript on ARM64 System

Hi,
After installing FortiClient (FortiClientVPNSetup_7.4.3.1790_ARM64), it worked great.
After a week, I can no longer start FortiClient.
ERROR Screenshot 2025-04-08 142320.png
I've already uninstalled it and tried FCRemover.exe.
Nothing helped.
What's the problem, what can I do?
Regards, Martin

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1 Solution
Jean-Philippe_P
Community Manager
Community Manager

Created on ‎04-15-2025 01:17 AM

Hello again Martin,

 

I found this solution, can you tell me if it helps you, please?

 

To address the "A JavaScript error occurred in the main process" issue with FortiClient on Windows 11, follow these steps:

  1. Check Compatibility: Ensure that the version of FortiClient you are using is compatible with Windows 11 ARM64 architecture.
  2. Reinstall FortiClient: Uninstall the current FortiClient using the standard Windows uninstallation process. Download the latest compatible version of FortiClient for ARM64 from the official Fortinet website and install the downloaded version.
  3. Clear Cache and Temporary Files: Use the Disk Cleanup tool to clear temporary files and system cache.
  4. Update System: Ensure that your Windows 11 is up to date with the latest patches and updates.
  5. Check for JavaScript Errors: If the error persists, check for any JavaScript-related issues in your system that might be causing the error. If the problem continues after these steps, consider reaching out to Fortinet support for further assistance.
Regards,
Jean-Philippe - Fortinet Community Team

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RHHSupport
New Contributor III

Created on ‎11-19-2025 04:35 AM

Be carefull.
Forticlient version 7.4.3 and Forticlient VPN 7.4.3 have a vulnerability: CVE-2025-46373 with a high Severity!

There is no VPN 7.4.4 Client available. Fortinet is distributing the older vulnerable version trough the fortinet.com website and don't give support for the Free VPN only Client.

282
Sylatex
New Contributor II
In response to RHHSupport

Created on ‎11-19-2025 05:05 AM

If you log in and then go to Downloads > Forticlient, you can download version 7.4.4!

251
RHHSupport
New Contributor III
In response to Sylatex

Created on ‎11-19-2025 06:56 AM

Yes you can download Forticlient 7.4.4 but not the VPN only. It doesn't exist.

From the release notes:

FortiClient (Windows) 7.4.4 does not include a new version of the free VPN-only agent as no feature
updates were made to the free VPN-only agent between 7.4.3 and 7.4.4. Users can continue to use the
FortiClient (Windows) 7.4.3 free VPN-only agent.

 

I received information they are working on a VPN only 7.4.4 client but no ETA yet.

240
TechWorldOmid
New Contributor

Created on ‎12-10-2025 06:29 AM

FIXED!!!!!!
There is a solution for installing FortiClient VPN on ARM64 processors.

Check this YT video!

https://youtu.be/eoAWs2_e70A?si=hPBYIMyf-jL61VYD

36
Andrei_Primend
New Contributor II
In response to TechWorldOmid

Created on ‎12-11-2025 02:19 AM

This only addresses the install issue that one person here reported, not the JavaScript error that comes up when launching the client.

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TechWorldOmid
New Contributor
In response to Andrei_Primend

Created on ‎12-11-2025 04:30 AM

Try to uninstall and re-install the vpn again and your issue will be resolved. I had same case and this method solved the Java script issue. 

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