I had dash running on my pc before without problems. I had to reinstall and now I can't get it to work.
Even when I use the most basic code I get the same error.
Here I used the very first code example of the tutorial with montreal and sf https://dash.plot.ly/getting-started#installation

I still always get this error:

File "", line 25, in
app.run_server(debug=True)

File "/Users/Wheez/anaconda3/envs/py36/lib/python3.6/site-packages/dash/dash.py", line 568, in run_server
self.server.run(port=port, debug=debug, **flask_run_options)

File "/Users/Wheez/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 938, in run
cli.show_server_banner(self.env, self.debug, self.name, False)

File "/Users/Wheez/anaconda3/envs/py36/lib/python3.6/site-packages/flask/cli.py", line 629, in show_server_banner
click.echo(message)

File "/Users/Wheez/anaconda3/envs/py36/lib/python3.6/site-packages/click/utils.py", line 259, in echo
file.write(message)

UnsupportedOperation: not writable

I run it on python 3.6 with anaconda and spyder and followed the installation tutorial.
I have no idea what to do. Thanks for any help.