Matplotlib 3.3 Deprecated
It seems Matplotlib deprecated some functions atomap uses. When I updated my packages, I got the following when I tried to import atomap.
The text.latex.preview rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later. The mathtext.fallback_to_cm rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later. Support for setting the 'mathtext.fallback_to_cm' rcParam is deprecated since 3.3 and will be removed two minor releases later; use 'mathtext.fallback : 'cm' instead. The validate_bool_maybe_none function was deprecated in Matplotlib 3.3 and will be removed two minor releases later. The savefig.jpeg_quality rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later. The keymap.all_axes rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later. The animation.avconv_path rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later. The animation.avconv_args rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later.
If anyone else runs into this, using version 3.2.2 fixed the import for me.