No pptx generated.

[einsteniano4000]

I followed the tutorial steps and encountered two problems: 1) pip can't find the package gpt-3.5-turbo; 2) When I launch the GUI, the PowerPoint isn't generated, and I get the following error:
{file_path}
/home/antonio/projetc/myppt.pptx
sh: 1: START: not found'."

My .env file :

GCS_CX='my_cx_key'
GCS_DEVELOPER_KEY='my_developer_key'
OPENAI_API_KEY='my_open_ai_key`