Failed To Launch Downloader Cisco Anyconnect 4.10 -

When you run the web launcher from Downloads, macOS runs it from a read-only mount.

show vpn-sessiondb anyconnect
show webvpn anyconnect
debug webvpn anyconnect 255  (Look for "downloader failed" messages)

Modern Windows Defender Application Control (WDAC) or AppLocker may block any .exe running from %AppData% or %Temp%. failed to launch downloader cisco anyconnect 4.10

Kill processes that may hold file locks on the downloader: When you run the web launcher from Downloads,

Windows:

taskkill /f /im vpnui.exe
taskkill /f /im vpnagent.exe
taskkill /f /im vpndownloader.exe

macOS:

sudo killall vpnagentd
sudo killall vpnui