I’ve had similar issues a long time ago so I don’t remember if it was due to an incompatible CPU or just windows being windows. The latter is not a problem since you are on Ubuntu.
I’m just thinking out loud:
- Did you upgrade pip (>19.0)
- Does your CPU support AVX?
Starting with TensorFlow 1.6, binaries use AVX instructions which may not run on older CPUs.
checklist here - might not apply to the version of TF that rasa uses though.