Would these error help?
Traceback (most recent call last):
  File "C:\Users\PML\.conda\envs\floren\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Users\PML\.conda\envs\floren\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:\Users\PML\.vscode\extensions\ms-python.python-2021.6.944021595\pythonFiles\lib\python\debugpy\__main__.py", line 45, in <module>   
    cli.main()
  File "c:\Users\PML\.vscode\extensions\ms-python.python-2021.6.944021595\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 444, 
in main
    run()
  File "c:\Users\PML\.vscode\extensions\ms-python.python-2021.6.944021595\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 285, 
in run_file
    runpy.run_path(target_as_str, run_name=compat.force_str("__main__"))
  File "C:\Users\PML\.conda\envs\floren\lib\runpy.py", line 263, in run_path
    pkg_name=pkg_name, script_name=fname)
  File "C:\Users\PML\.conda\envs\floren\lib\runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "C:\Users\PML\.conda\envs\floren\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:\Users\PML\Documents\Florentino_space\cast_iron_preprocess\autoencoder20210615\train.py", line 48, in <module>
    print(f"loss at epoch {epoch+1}/{config.NUM_EPOCHS} is {losses:.4f}.")
TypeError: unsupported format string passed to list.__format__