SUMMARY
When trying to connect to my work place's GlobalProtect VPN, the connection times out after the authentication and gateway selection phase. This used to work some time ago (roughly 1 year ago), but I do not use this often enough to pinpoint when in stopped working. It could also be something that changed one the server side.

What does work is to connect using 'nmcli --ask connection up VPN', so it's definitely something with plasma-nm.

STEPS TO REPRODUCE
1. Connect to GlobalProtect VPN
2. Enter username / password and log in
3. Select gateway and the authentication window closes. Timeout occurs in ~1 minute.

OBSERVED RESULT
Log output is somewhat lacking:

Jan 17 11:17:16 kyle NetworkManager[790]: <info>  [1705486636.7962] vpn[0x64677478fac0,040f8208-cd33-45b7-8f5a-8805f67317d1,"VPN"]: starting openconnect
Jan 17 11:17:16 kyle NetworkManager[790]: <info>  [1705486636.7964] audit: op="connection-activate" uuid="040f8208-cd33-45b7-8f5a-8805f67317d1" name="VPN" pid=1205 uid=1000 result="success"
Jan 17 11:17:16 kyle kernel: tun: Universal TUN/TAP device driver, 1.6
Jan 17 11:17:16 kyle kded5[1146]: org.kde.plasma.nm.kded: Unhandled VPN connection state change:  NetworkManager::VpnConnection::NeedAuth
Jan 17 11:17:16 kyle kded5[1146]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:16 kyle plasmashell[1205]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:16 kyle kded5[1146]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:16 kyle plasmashell[1205]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:17 kyle plasmashell[1205]: file:///usr/lib/qt/qml/org/kde/plasma/extras/PlaceholderMessage.qml:238:5: QML Heading: Binding loop detected for property "verticalAlignment"
Jan 17 11:17:18 kyle kded5[1146]: QFormLayout::takeAt: Invalid index 0
Jan 17 11:17:39 kyle kded5[1146]: QFormLayout::takeAt: Invalid index 0
Jan 17 11:17:39 kyle kded5[1146]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:39 kyle kded5[1146]: org.kde.plasma.nm.kded: Unhandled VPN connection state change:  NetworkManager::VpnConnection::Connecting
Jan 17 11:17:39 kyle NetworkManager[790]: <info>  [1705486659.2530] manager: (vpn0): new Tun device (/org/freedesktop/NetworkManager/Devices/3)
Jan 17 11:17:39 kyle plasmashell[1205]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:39 kyle kded5[1146]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:39 kyle NetworkManager[790]: <info>  [1705486659.2563] audit: op="connection-update" uuid="040f8208-cd33-45b7-8f5a-8805f67317d1" name="VPN" args="connection.timestamp,vpn.secrets" pid=1146 uid=1000 result="success"
Jan 17 11:17:39 kyle NetworkManager[3631]: POST https://1.2.3.4/ssl-vpn/getconfig.esp
Jan 17 11:17:39 kyle plasmashell[1205]: kf.networkmanagerqt: void NetworkManager::ConnectionPrivate::onPropertiesChanged(const QVariantMap&) Unhandled property "VersionId"
Jan 17 11:17:39 kyle NetworkManager[3631]: Connected to 1.2.3.4:443
Jan 17 11:17:39 kyle NetworkManager[3631]: SSL negotiation with 1.2.3.4
Jan 17 11:17:39 kyle NetworkManager[3631]: Server certificate verify failed: signer not found
Jan 17 11:17:39 kyle NetworkManager[3631]: Connected to HTTPS on 1.2.3.4 with ciphersuite (TLS1.2)-(ECDHE-SECP256R1)-(RSA-SHA256)-(AES-256-GCM)
Jan 17 11:17:46 kyle NetworkManager[790]: <info>  [1705486666.3772] audit: op="statistics" interface="enp6s0" ifindex=2 args="2000" pid=1205 uid=1000 result="success"
Jan 17 11:17:48 kyle plasmashell[1205]: file:///usr/lib/qt/qml/org/kde/plasma/extras/PlaceholderMessage.qml:238:5: QML Heading: Binding loop detected for property "verticalAlignment"
Jan 17 11:17:49 kyle kwin_wayland[1006]: This plugin does not support raise()
Jan 17 11:18:39 kyle NetworkManager[790]: <warn>  [1705486719.9773] vpn[0x64677478fac0,040f8208-cd33-45b7-8f5a-8805f67317d1,"VPN"]: connect timeout exceeded
Jan 17 11:18:39 kyle nm-openconnect-[3613]: Connect timer expired, disconnecting.
Jan 17 11:18:39 kyle NetworkManager[3631]: TLS/DTLS read cancelled
Jan 17 11:18:39 kyle NetworkManager[3631]: Error reading HTTP response: Interrupted system call
Jan 17 11:18:39 kyle NetworkManager[3631]: Creating SSL connection failed
Jan 17 11:18:39 kyle NetworkManager[3631]: User cancelled (SIGINT/SIGTERM); exiting.

EXPECTED RESULT
When using nmcli the connection goes through right away. The log output looks very similar, it just continues with more connection info instead of the timeout error.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.114.0
Qt Version: 5.15.12
Kernel Version: 6.7.0-arch3-1 (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: AMD Radeon RX 6800 XT
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: X570 AORUS ELITE
System Version: -CF

ADDITIONAL INFORMATION