Plotting Doesn't Work Since Updating to macOS Big Sur

Since I updated to macOS Big Sur I can no longer run code that requires an external window to pop up, which is the case with matplotlib or any other plotting library.

The codes run up to the point of plotting and then the external Python window icon pops up on the dock for less than a second and the runtime of the code on Atom stops, showing an alert triangle but without giving any information about what happened.

Could this be related to the script package? I am using Atom 1.53.0 and script 3.26.0.

I would like to note that the aforementioned codes that I try to run all work well in other platforms such as PyCharm, Jupyter Notebooks, etc.

No source file or test is named. Start by reproducing the failure on macOS Big Sur with Atom 1.53.0, script 3.26.0, and a matplotlib program, then inspect the script package's handling of external Python windows. Done means plotting runs without the runtime stopping and the failure, if it remains, reports useful information.

Written by the indexing model from the issue text.