Anaconda Navigator (5.1, Py3.6) won't open on macOS

[a-joyce]

Actual Behavior

Anaconda loads then immediately opens an HTML file stating the Main Error is :

could not determine a constructor for the tag 'tag:yaml.org,2002:python/unicode'
in "/Users/alexajoyce/Library/Application Support/binstar/config.yaml", line 1, column 1

as well as traceback I can provide if needed.

Expected Behavior

The anaconda navigator should open.

Steps to Reproduce

Click on the icon to open the application.

Anaconda or Miniconda version:

Latest Version (5.1) for macOS running Python 3.6

Operating System:

High Sierra 10.13.3

conda info

n/a

conda list --show-channel-urls

n/a

[a-joyce]

Seems to be a duplication of issue #8607 and #8672 I have just seen- will delete my issue if preferable

[goanpeca]

Closing as duplicate of #8420

---

Please remember to update to the latest version of Navigator to include
the latest fixes.

Open a terminal (on Linux or Mac) or the Anaconda Command Prompt (on windows)
and type:

conda update conda
conda update anaconda-navigator
conda update navigator-updater

---

See issue #8420 for more information on how to fix this issue.

Or run

conda install anaconda-client=1.6.11