Hi @guilhermedonizetti, welcome to the Streamlit community!! 
The installation instructions for pytesseract say that Google’s tesseract-ocr is a dependency. Meaning, you need to install tesseract-ocr as an apt-get dependency (for Linux applications outside the Python environment).
The way to do that is to include the necessary dependencies in a packages.txt file in your repo:
-
Create a new
packages.txtfile with the following lines:tesseract-ocr tesseract-ocr-por -
The first line installs the base
tesseract-ocrapplication and supports only English by default. To support Portuguese, you need to install a language specific tesseract data file, which we do in the second line. -
Reboot your app
Once you make the above changes, your app should successfully deploy! 
Happy Streamlit’ing! 
Snehan