My DMR hotspot was silent for some time because I had neglected to update it with a newly required password.
The Brandmeister network article on hotspot security has the detail that you need to carry this out. You'll want the "hotspot security" section of the "SelfCare" setting at Brandmeister, and on the MMDVM side the menu option is under "Configuration" / "Hotspot Security".
It took but a moment and now all is well again.
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