mk0417

I also had the problem after the upgrade of jupyter_client from 7.3.1 to 7.3.2. There is an issue in version 7.3.2 and it is fixed in version 7.3.3 (see links...

I had a similar issue. Thanks @xhochy, and I can build the connection successfully after I set the path.

I had the same problem after I upgraded jupyter-core to 5.6.0 recently. The version of 5.5.1 works.