If I’m reading correct (and understanding, i’m tired)
You need to edit
/etc/asterisk/modules.conf
Look through the list til you see
noload => chan_simpleusb.so ; erase the ‘no’ and save
load => chan_simpleusb.so ;
Edit your /etc/asterisk/rpt.config for the node you are setting up and replace node number in my example…
[29285] ;assigned node number UHF repeater
rxchannel = SimpleUSB/usb_29285 ; Rx audio/signalling channel usb_29285 must match the definition inside your simpleusb.conf file, and I don’t know what the default will be on current version. Just check that it matches, whatever you call it. Would look like [usb_29285] for settings to follow in the file. Save your edits.
restart asterisk…
Systemctl restart asterisk
Then you should be able to continue the process.