Hi @Marwan_Ashraf, and welcome to our community! 
The installation instructions for pytesseract say that Google’s tesseract-ocr is a dependency.
It may be useful to get a full error log trace on your issue, but it’s likely you would need to install tesseract-ocr as an apt-get dependency (for Linux applications outside the Python environment).
Have a look a this step-by-step explanation by Snehan to deploy it on our Community Cloud service.
Let me know if questions.
Best,
Charly