AWS VPN Client for Mac not starting on Sonoma 14.3.1 (Intel)

The AWS VPN Client is crashing when trying to select a configuration file.

This might be helpful from the logs:

Platform: MacOS
App version: 3.9.1
OS version: Unix 23.3.0.0
OS description: Unix 23.3.0.0

2024-02-23 11:45:41.471 +01:00 [DBG] Inserted event PROFILE_CONFIGURATION_VERSION 1 to AnalyticsTable
2024-02-23 11:45:41.471 +01:00 [DBG] Current metadata schema version is 1, which is less or equal to current supported version: 1. 
2024-02-23 11:45:41.473 +01:00 [DBG] Inserted event CLICK_LAUNCH_DESKTOP_APP 1 to AnalyticsTable
2024-02-23 11:45:41.550 +01:00 [DBG] Updater checks started
2024-02-23 11:45:41.554 +01:00 [DBG] Directory of up and down scripts /Library/Application Support/AWSVPNClient doesn't exist. Skipping
2024-02-23 11:45:41.555 +01:00 [DBG] Total logs size (MB): {0}0
2024-02-23 11:45:41.558 +01:00 [DBG] Inserted event LOG_DISK_USAGE 0 to MetricsTable
2024-02-23 11:45:41.560 +01:00 [DBG] Inserted event LOG_DISK_USAGE_INFO 0 to AnalyticsTable
2024-02-23 11:45:46.302 +01:00 [DBG] Inserted event CLICK_TRAY_ICON 1 to AnalyticsTable
2024-02-23 11:46:56.401 +01:00 [ERR] Unexpected exception occurred. Cleaning resources.
System.NullReferenceException: Object reference not set to an instance of an object
  at ACVC.OSX.Utils.FilePicker.GetOvpnConfigFile () [0x00006] in <3e3d1bd9a6f24f94a8dd8ce7de2d7f24>:0 
  at ACVC.OSX.ViewControllers.AddProfileViewController.ImportFromFileButtonClicked (Foundation.NSObject sender) [0x00000] in <3e3d1bd9a6f24f94a8dd8ce7de2d7f24>:0 
  at (wrapper managed-to-native) AppKit.NSApplication.NSApplicationMain(int,string[])
  at AppKit.NSApplication.Main (System.String[] args) [0x00040] in <bbda61599649495284b7af382ef41f21>:0 
  at ACVC.OSX.MainClass.Main (System.String[] args) [0x00065] in <3e3d1bd9a6f24f94a8dd8ce7de2d7f24>:0 

Is MacOS 14.x not supported at all?

Thanks a lot for any hints