OSX Lancom VPN “Open logfile failed”

1) In macOS X, click on the Finder.

2) In the Finder, switch to the menu Go -> Computer.

3) Double-click on the hard disk where the Advanced VPN Client is installed.

4) Check the path Library/Logs to see if the folder NCP exists.

5) If the folder NCP does not exist, create this in the Finder by clicking on File -> New folder.

6) Select the folder NCP and, in the Finder, click on File -> Get Info to view the permissions.

You may have to click the triangle next to Sharing & Permissions to view the permissions.

7) Click on Privileges and, from the drop-down menu, select Read & Write so that the write permissions are enabled.