Problem with Adding library with MBED CLI

HI
I install the Mbed Cli , I can compile programs and…
but when I want to Add a library :
mbed add https://developer.mbed.org/users/AtomX/code/MFRC522
or : mbed add https://developer.mbed.org/users/wim/code/TextLCD

I see following error:
fatal : unable to access ‘https://developer.mbed.org/users/wim/code/TextLCD’: empty reply from server
[mbed] ERROR : unable to clone repository <'https://developer.mbed.org/users/wim/code/TextLCD/>

what is wrong with me ??
can you help me ?
Thanks