On my Win 10 Notebook, Forticlient stops to connect to all sites that I've configured. I altready try to disable AV, reinstall a new version but the problem is the same. Counter arrives at 89% and the error report: Unable to establish The VPN connection. The VPN server may be unreachable. (-5052). If I try to connect to SSL Web autentication and everything works. Also same profile Is ok using forticlient Mobile on IOS. Does anyone already had this problem? I don't find anything with this error code (-5052).
What software version of FortiClient are you running?
Did you try to check with another version of Forticlient?
You mentioned that it's dropping at 89%. Usually, disconnection above 80% indicates that the device or client who’s causing problem. Please try to login using the same profile from another system and see if that works.
Disable your computer's firewall and antivirus software for a while to check if they are preventing the VPN connection. If the VPN connection functions after you disable them, change the settings to let the required VPN traffic through.
FortiClient or your PC can occasionally be restarted to fix momentary connectivity problems or conflicts. Try reconnecting to the VPN again after closing FortiClient and restarting your computer.
Remove the contents of %localappdata%\Forticlient\ and it will connect again. Note that if you use SAML, this will require a new sign-in (and probably remove any other saved credentials), but it will not remove connection profiles since those are stored in the registry.
I discovered this after I was able to connect just fine on another Windows profile from a user's computer that was getting -5052 and -5053 after reinstalling, many restarts, trying 7.0.7.x, 7.0.8.x, and 7.2.0.x
I'm sure there is a more elegant solution than blasting the whole folder, but I haven't seen the issue more than once or been able to reproduce it for testing.
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