Hi, I finally solved my issue like this. In version 1.5.5 I've bound my cacert in /opt/java/openjdk/jre/lib/security/cacerts in the container. It looks like this cacerts file is no longer used. I bind now on /opt/java/openjdk/lib/security/cacerts and Guacd SSL works like before.
Is it a good way to do that ?
