Make sure you're using 48Khz IRs. Other bitrates may not work. They included this in the Cabclone IR stand-alone manuals but neglected to include this very important piece of info in the Badlander manual. I had loaded my go-to Ownhammer IRs into mine once and had no sound from it, turns out they were 44.1k, not 48k. I redownloaded 48k versions and the amp XLR out magically worked again.
From the Cabclone manual, page 17:
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