I have a similar issue with a RUTX11 gpsd process, the firmware version is RUTX_R_00.02.01.1:
[Error ] Failed to lookup "enabled" uci option
[Crit ] Failed to initialize NMEA collecting
The device itself is fine, cat /dev/ttyUSB1 returns NMEA data.
This is hard to debug as gpsd doesn't say witch option/section is missing. And without symbols gdb is blind.
Oops: found it, the SDK contains a working gps.conf and a non-stripped gpsd, enough to get it running.