Ok, I have released a new Viewer version. Should appear an upgrade in your Desktop application automatically. If not, close and open again. I don’t know if this fix will work, it just switches immis protocol to rtsps so let’s see.
I imagine they have overriden the original protocol to implement two-way audio for XT2 cameras. In case this does not work, check in the log file if immis:// has been replaced with rtsps. If so, it will be quite difficult to solve it as I do not have any of these cameras…fingers crossed!!