I just installed Mojave last night. This morning I am getting this error in Jupiter notebook. Never had this before. Any fix? Thank you.

I'm facing a similar problem
So far,
conda install ipykernel=4.8.2
is work for me.
Reinstall or update Xcode tools.
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On Oct 26, 2018, at 8:28 AM, Gianr Lazz notifications@github.com wrote:
I am having something similar...
I cannot even launch it, as I getTraceback (most recent call last):
File "/usr/local/bin/jupyter", line 7, in
from jupyter_core.command import main
ModuleNotFoundError: No module named 'jupyter_core'
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Most helpful comment
Reinstall or update Xcode tools.
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