Hello Azadeh,
The address “baobab2.unige.ch” was still working until yesterday to give a transition time. As announced last year (Baobab migration from CentOS6 to CentOS7), the “new” address to connect is : baobab2.hpc.unige.ch
Please check with the new one and everything should work. Any ongoing job won’t be affected.
Cheers,
Massimo