Ubuntu's forticlient has expired

Hi

A customer of mine grants me access to his network using forticlient.

I installed the Ubuntu version using the official repos from here https://www.fortinet.com/support/product-downloads/linux

Now I'm getting this error message

FortiClient SSLVPN is unavailable: FortiClient VPN trial has expired.
Please contact your administrator or connect to EMS for license activation.

Looking in other threads (https://community.fortinet.com/t5/Support-Forum/Forticlient-free-version-expires/m-p/231) that I need the "FortiClient VPN" only. However I don't know how to get that.

I've found this article https://docs.fortinet.com/document/forticlient/7.2.2/administration-guide/666761/linux but I'm not sure how to get any of these files.

I'm able to log in support.fortinet.com, but if I go to Firmware downloads, I only see a blank list and the error message Sorry, you don't have any product covered by a Fortinet support contract.

Where do I get the FortiClient VPN for linux so that I don't have to reinstall it all the time this error message appears?

This KB article https://community.fortinet.com/t5/FortiClient/Technical-Tip-How-to-install-FortiClient-on-Ubuntu-22-04-LTS/ta-p/217162 says

Ensure FortiClient is downloaded through the Fortinet Support Portal, support.fortinet.com.

But, how can I "ensure" that?

Thanks