Keras Pandas module not found

You have probably installed Tensorflow / Keras in a specific Anaconda environment. However, Keras is an older extension and cannot identify Anaconda environments. When you configure the Keras extension, you will need to select Python from your Keras environment, i.e. you will need to explicitly navigate to that environment and select it from there. Make sure that Pandas and numerous other packages are installed in that environment as well. Note that a newer Deep Learning extension will allow building exactly the same deep learning models as in Keras but it is supported in RapidMiner natively, so there is no need to install Anaconda, Tensorflow or Keras, all you need is the ND4J extension (in addition to DL).