Hi,

I get zero output in the notebook interface.

   - Entering 1+1, then pressing evaluate yields an empty output cell with 
   a "loading circle" when I hover the mouse over it.
   - Entering ver, then pressing Tab for completion (to version) yields "
   loading..." and it never goes away.

Can anyone give me a pointer where to start?
What does the error at the end mean?

My Session:

sage: version()
'SageMath Version 6.9, Release Date: 2015-10-10'

sage: notebook()
The notebook files are stored in: sage_notebook.sagenb
┌────────────────────────────────────────────────┐
│                                                │
│ Open your web browser to http://localhost:8080 │
│                                                │
└────────────────────────────────────────────────┘
Executing twistd  --pidfile="sage_notebook.sagenb/sagenb.pid" -ny 
"sage_notebook.sagenb/twistedconf.tac"
/usr/lib/sagemath/local/lib/python2.7/site-packages/Crypto/Util/number.py:57: 
PowmInsecureWarning: Not using mpz_powm_sec.  You should rebuild using 
libgmp >= 5 to avoid timing attack vulnerability.
  _warn("Not using mpz_powm_sec.  You should rebuild using libgmp >= 5 to 
avoid timing attack vulnerability.", PowmInsecureWarning)
2015-12-03 14:06:56+0100 [-] Log opened.
2015-12-03 14:06:56+0100 [-] twistd 14.0.2 
(/usr/lib/sagemath/local/bin/python 2.7.9) starting up.
2015-12-03 14:06:56+0100 [-] reactor class: 
twisted.internet.epollreactor.EPollReactor.
2015-12-03 14:06:56+0100 [-] QuietSite starting on 8080
2015-12-03 14:06:56+0100 [-] Starting factory <__builtin__.QuietSite 
instance at 0x7fa39efbb9e0>
[9721:9721:1203/140657:ERROR:nss_util.cc(845)] After loading Root Certs, 
loaded==false: NSS error code: -8018

Thanks, Best,
Steffen

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