CDH config detection not working because not able to connect to YARN RM on port 8088

I'm trying to configure Toad for Hadoop with our Cloudera 5.5 cluster (16 nodes).

Unfortunately, I get stuck immediately with the config window (YARN part).

However, we have SSL/TLS enabled for the webapp for YARN RM. So the info is on port 8090. Nothing can be found on port 8088.

I don't know if Toad just assumes it can find it there or if Cloudera Manager is somehow not giving the right information (the yarn-site.xml has both the yarn.resourcemanager.webapp.address.xyz and yarn.resourcemanager.webapp.https.address values).

Any help?