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 MFRC522 - RFID Chip MFRC522 driver | Mbed
or : mbed add TextLCD - Updated for more display types. Fixed memoryaddr… | Mbed

I see following error:
fatal : unable to access ‘TextLCD - Updated for more display types. Fixed memoryaddr… | Mbed’: empty reply from server
[mbed] ERROR : unable to clone repository <'TextLCD - Updated for more display types. Fixed memoryaddr… | Mbed>

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