I had this issue too. I traced it down to the fact that there was a missing xml file. I've no idea why it was missing. There's obviously something wrong with the installation bundle.

To fix, you need to put the contents of this file github.com/indilib/indi-3rdparty/blob/ma...ndi_rpicam.xml.cmake into /usr/share/indi/indi_rpicam.xml and then reboot (or restart Indi Web Manager).

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