EC21 LTE Modem quectel-CM connection failed

I am trying to use EC21 LTE Modem connected to SBC (Hardkernel’s ODROID-C4) via USB.
I built and registered Linux kernel environment settings and drivers according to the vendor’s guide, but the following error continues.
uname -a : Linux odroid 4.9.337-90

Hi @Engineer
Can you give me your email, I will send you the latest driver, you try with the latest driver, because from the screenshot to see the system did not recognize the module. If the USB connection is OK, it may still be a driver problem.