Windows: DLL load failed when importing TensorFlow via reticulate (uv / keras3)

[Liu499-create]

Description

I am using R (keras3 + reticulate) on Windows.
When TensorFlow is initialized via reticulate, I consistently encounter
"DLL load failed while importing _pywrap_tensorflow_internal".

This happens when calling keras3::dataset_mnist() or importing tensorflow
via reticulate.

---

Reproducible example

library(reticulate)
library(keras3)

mnist <- dataset_mnist()

reticulate::py_config()
python:         C:/Users/Administrator/AppData/Local/R/cache/R/reticulate/uv/cache/archive-v0/HLPRwwBf27sR11YLimOxx/Scripts/python.exe
libpython:      C:/Users/Administrator/AppData/Local/R/cache/R/reticulate/uv/python/cpython-3.12.12-windows-x86_64-none/python312.dll
pythonhome:     C:/Users/Administrator/AppData/Local/R/cache/R/reticulate/uv/cache/archive-v0/HLPRwwBf27sR11YLimOxx
virtualenv:     C:/Users/Administrator/AppData/Local/R/cache/R/reticulate/uv/cache/archive-v0/HLPRwwBf27sR11YLimOxx/Scripts/activate_this.py
version:        3.12.12 (main, Dec  9 2025, 19:02:55) [MSC v.1944 64 bit (AMD64)]
Architecture:   64bit
numpy:          C:/Users/Administrator/AppData/Local/R/cache/R/reticulate/uv/cache/archive-v0/HLPRwwBf27sR11YLimOxx/Lib/site-packages/numpy
numpy_version:  1.26.4
keras:          C:\Users\Administrator\AppData\Local\R\cache\R\reticulate\uv\cache\archive-v0\HLPRwwBf27sR11YLimOxx\Lib\site-packages\keras

NOTE: Python version was forced by py_require()

when i run code mnist <- dataset_mnist() always tell me the below infos:

Error: ImportError: Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\R\cache\R\reticulate\uv\cache\archive-v0\HLPRwwBf27sR11YLimOxx\Lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 73, in
<...truncated...> ^^^^^^
File "C:\Users\Administrator\AppData\Local\R\win-library\4.5\reticulate\python\rpytools\loader.py", line 120, in _hook
return find_and_load(name, import)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError: DLL load failed while importing _pywrap_tensorflow_internal: The dynamic link library (DLL) initialization routine failed.

Failed to load the native TensorFlow runtime.
See https://www.tensorflow.org/install/errors for some common causes and solutions.
If you need help, create an issue at https://github.com/tensorflow/tensorflow/issues and include the entire stack trace above this error message.
Run reticulate::py_last_error() for details.