Tensorflow driver : UNKNOWN ERROR (303)

Same problem with

OS Ubuntu 18.04.3 (virtual environment, vmware) Python version: 3.6.9

tensorflow packages: tensor2tensor==1.14.1 tensorboard==1.15.0 tensorflow==1.15.0 tensorflow-datasets==1.3.2 tensorflow-estimator==1.15.1 tensorflow-gan==2.0.0 tensorflow-hub==0.7.0 tensorflow-metadata==0.15.2 tensorflow-probability==0.7.0

Could the issue be related to cuda not being installed? I checked my Ubuntu folders and cuda isn’t installed. Two questions:

  1. Can Rasa run with the tensorflow-gpu version?
  2. Should cuda be installed if running a cuda-compatible Nvidia graphics card?