Forticlient VPN blank screen on start-up

[acas]

For the past few months I have tried to fix this issue: when starting up forticlient VPN on my mac OS 11.1 (but this issue was already happening before updating to Big Sur) I just get a blank (white) screen (see attached image).

The forticleint uninstaller won't work and when clicking on the top menu bar's forticlient icon > "shutdown fortclient" a "Failed to shutdown FortiClient - Some services are not able to be shutdown" message is displayed.   I have uninstalled manually following the instructions at: https://www.infosecmonkey.com/2019/10/18/manually-uninstalling-forticlient-on-macos/

This works fine, and it has permitted me to unistall and re-install many different versions of forticlient VPN (6.4, 6.0 , 6.1 ...) , but to no avail, the blank screen always keeps appearing on start-up.

As described here: https://forum.fortinet.com/tm.aspx?m=163832 I have also tried to install node.js, but the same problem keeps happening. 

This problem started after I performed some "clean-up" on my mac deletting many files, and I must have deleted some file that fortclient uses. Before this it was working fine.

Any help would be greatlly aprreciated after months of searching for a solution, thanks, Alex. 

[SimonHo]

Hi Alex ,

Have You fixed the issue.

After install 40+ PCS we also have 2 PCs have this issue.

Even Uninstall or try many version it still happened.

[acas]

For the moment I have no solution, if you find one please communicate it, as I am currently unable to use forticlient on my mac due to this problem.

[pp]

acas wrote:

For the moment I have no solution, if you find one please communicate it, as I am currently unable to use forticlient on my mac due to this problem.

You probably need to (re)install node.js see:  https://forum.fortinet.com/FindPost/191820 

https://forum.fortinet.com/tm.aspx?m=163832

[EMCsquared]

HI, 
I am also having this issue. 
Macbook pro 2017 OS Ventura
Maccleaner Pro was used to perform a clean
OS was updated
Since this Forticlient is opening only with a blank white window. And when I shut down the app a pop-up saying "Failed to stop services" appears 

Re-installing Forticlient has not worked. 
Legacy versions do not appear to conenct.

Maccleaner has been removed. Java is updated. 
VPN has access and security permissions.

Any other ideas? This is ruining my ability to work from home! 
Send Help!