After upgrading to dbus-java 5.1.0 (from 5.0.0) receiving signals doesn't work anymore. I didn't see anything related in the changelog.

Could not find suitable constructor for class org.asamk.Signal$MessageReceivedV2 with argument-types: [class java.lang.Long, class java.lang.String, class java.util.ArrayList, class java.lang.String, class java.util.LinkedHashMap]

The constructor is defined here (which worked until 5.0.0): https://github.com/AsamK/signal-cli/blob/master/src/main/java/org/asamk/Signal.java#L201
public MessageReceivedV2( String objectpath, long timestamp, String sender, byte[] groupId, String message, final Map<String, Variant<?>> extras ) throws DBusException

I tried removing the first objectpath path parameter and changing the byte[] to a List<Byte>, but that didn't work either.

Do I need to adapt anything in my code, or is this a bug?