I don't see the errors reading firmware/version that you do when running flirc_util, e.g.
Code
ROCK5B:~ # flirc_util
[W] lib/cmds.c handle_longopt(180): `version' doesn not take '--pretty' option
flirc_util version b71c83813a98efb92d565792bdcab96efa3533e0 [b71c838+]
Firmware Detected
FW Version: v4.10.1
SKU: Flirc 2.0 [dori]
Branch: release
Config: release
Hash: 0x26D56A46
Commands:
delete Delete next remote button flirc sees from saved database
delete_index Delete button at index displayed in `flirc_util settings`
device_log Displays the log on the device
dfu Kick in or out of Device Firmware Upgrade mode
format Remove all saved buttons from flirc
help Show this help. Also try `help <command>`
interkey_delay set the interkey delay
loadconfig Load configuration file from disk to flirc
loglevel set the log level
mode Enable or disable a usb mode
noise_canceler Noise canceler to prevent phantom presses
normal Put flirc in normal user mode
profiles enable or disable built in profiles
reboot Displays all the devices current settings
record Record infrared buttons and link them to HID keys
record_api Advanced button recording
record_lp Record a long pres key
record_macro Record a macro key
rom_table enable or disable a give rom table
saveconfig Save configuration file to disk
script run a command script
sendir Send a packet over the IR transmitter
settings Displays all the devices current settings
sleep_detect Turns on sleep/suspend detection
unit_test Performs a self test
upgrade Uploads new firmware image to flirc hardware
version Print the application version and device version if connected
wait Waits for the device to be plugged in (used for scripting)
Display More
I'd suggest contacting flirc support as they know their hardware better than we do.