Plotly’s AttributeError: module ‘plotly.validators.layout.margin._t’ has no attribute ‘TValidator’

Plotly Error Message:

AttributeError: module ‘plotly.validators.layout.margin._t’ has no attribute ‘TValidator’

What worked for me:

I ran the following commands to verify that plotly was installed with both.

$ pip list
$ conda list

After confirming they were, I uninstalled both with the following commands:

$ pip uninstall plotly 
$ conda uninstall plotly

Lastly, I reinstall plotly using only one install method (conda):

conda install -c plotly plotly

I ran into this issue multiple times and noticed it would happen after updating all my Anaconda packages. The first mistake was sharing an environment with multiple projects. Anyways, I hope this helps anyone receiving the same error!