spyder3.2.8 unable to start kernel

If you don’t find anything, please provide a detailed step-by-step description (in English) of the problem and what led up to it below. Issue reports without a clear way to reproduce them will be closed. Thanks! —> An error ocurred while starting the kernel ERROR:tornado.general:Uncaught exception in ZMQStream callback Traceback (most recent call last): File “/usr/local/lib/python3.6/site‑packages/zmq/eventloop/zmqstream.py”, line 432, in _run_callback callback(*args, **kwargs) File “/usr/local/lib/python3.6/site‑packages/tornado/stack_context.py”, line 276, in null_wrapper return fn(*args, **kwargs) File “/usr/local/lib/python3.6/site‑packages/ipykernel/kernelbase.py”, line 283, in dispatcher return self.dispatch_shell(stream, msg)

Problem Description

kernel does not start or stays in a loo

What steps will reproduce the problem?

Package Versions

• Spyder version: 3.2.8
• Python version: 3.6.4
• Qt version: 5.9.3
• PyQt5 version: 5.9.2
• Operating system: Darwin 17.4.0

Dependencies

pyflakes >=0.6.0 :  1.6.0 (OK)
pycodestyle >=2.3:  2.3.1 (OK)
pygments >=2.0   :  2.2.0 (OK)
pandas >=0.13.1  :  0.21.0 (OK)
numpy >=1.7      :  1.13.3 (OK)
sphinx >=0.6.6   :  1.7.1 (OK)
rope >=0.9.4     :  0.10.7 (OK)
jedi >=0.9.0     :  0.11.1 (OK)
psutil >=0.3     :  5.4.3 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
sympy >=0.7.3    :  1.1.1 (OK)
cython >=0.21    :  0.27.3 (OK)
qtconsole >=4.2.0:  4.3.1 (OK)
IPython >=4.0    :  6.2.1 (OK)
pylint >=0.25    :  1.8.2 (OK)

[ccordoba12]

Probably, although the error is slightly different.

[femiaiyeku]

Upgrading ipykernel worked for me conda upgrade ipykernel