#398 DavMail does not show authentication dialog

[Phuc]

Hi,
My DavMail 6.0.0 is set up for O365Interactive authentication. I am using Open JDK 8 . DavMail seems to be unable to show an authentication dialog and process stops with the
Here is a log snippet. Full log is attached.

2021-11-27 18:28:19,683 DEBUG [ImapConnection-43708] davmail - < LOGIN **
2021-11-27 18:28:19,685 WARN [ImapConnection-43708] davmail.exchange.ExchangeSession - All network interfaces down or host unreachable !
2021-11-27 18:28:19,685 DEBUG [ImapConnection-43708] davmail.exchange.ExchangeSession - java.lang.ClassNotFoundException: davmail.exchange.auth.O365InteractiveAuthenticator
java.lang.ClassNotFoundException: davmail.exchange.auth.O365InteractiveAuthenticator
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at davmail.exchange.ExchangeSessionFactory.getInstance(ExchangeSessionFactory.java:178)
at davmail.exchange.ExchangeSessionFactory.getInstance(ExchangeSessionFactory.java:97)
at davmail.imap.ImapConnection.run(ImapConnection.java:128)
2021-11-27 18:28:19,687 INFO [ImapConnection-43708] davmail.connection - FAILED - 127.0.0.1:43708 <obfuscated>@<obfuscated>.com
2021-11-27 18:28:19,687 ERROR [ImapConnection-43708] davmail - All network interfaces down or host unreachable !
2021-11-27 18:28:19,687 DEBUG [ImapConnection-43708] davmail - > PJPF2 NO LOGIN failed
2021-11-27 18:28:19,713 INFO [ImapConnection-43708] davmail.connection - DISCONNECT - 127.0.0.1:43708</obfuscated></obfuscated>

I start DavMail using davmail Shell script provided in the official build which exports all Java libs under /usr/share/davmail/lib. Could you please help me understand what could be wrong here?