I am getting the error stated in the question title when trying to import dask.dataframe interface, even though import dask works.
My current version of dask is 2022.7.0. What might be the problem?
As it turns out, the problem was with version compatibility issues between Pandas and Dask. StringMethods is a part of Pandas' string handling functionality, which is used by Dask DataFrames.
However, I didn't know that this attribute was not available in older versions of Pandas.
I updated both libraries and the error was gone:
pip install --upgrade pandas "dask[complete]"