Rasa X v1.0.1 on GCP: Training failed + Upload failed

I installed Rasa X (1.0.1) using the Quick install (Rasa Ephemeral Installer) on GCP (8 vCPU 32Gb + 100Gb on disk, the system is Ubuntu). Connected to my Github flawlessly. Both training and uploading a model failed. Models were generated with Rasa 2.8.21. Checked the logs on all the pods, but found nothing. Any clue would be highly appreciated. I spent the last 4 days on it to no avail. Thanks in advance.

Check the version of rasa being used by rasa v1. Make sure your model is trained on the same version.

This hint fixed my issue