Keras @ Error: Python module tensorflow.keras was not found.

Have you started from a new project completely? Those errors seem to reference r-miniconda still

I think you need this part at the top, and I was missing a step before:

library(reticulate)
library(keras)
virtualenv_create("myenv")
use_virtualenv("myenv")
install_keras(method="virtualenv", envname="myenv")
use_virtualenv("myenv")

In the portion below, Ming provides a slight tweak of having to use_virtualenv again after the R session reloads. That seems to have solved the problem for that user

Can you please try in a new project, following the instructions above?

Thanks in advance!

-Joshua C. Forest