Also, to see if the Tensorflow dependencies are installed correctly, you can check for the following message in your RSC logs at startup:
2019/01/21 06:31:44 Disabling TensorFlow Model API support:
rstudio-connect cannot run TensorFlow Model APIs because
'libtensorflow.so' is unavailable
which are located in /var/log/rstudio-connect.log by default. Note that the logs might be rotated, so be sure to check the logs at RSC startup time, or restart the RSC server and check the most recent logs.