Hi @aossaba and welcome to the community!
Given the information you provide it is hard to say for sure what is causing your error. Please first check that your inputs meets the requirements. A common error is that there is a required data field missing or that the data isn’t in the right format, e.g. the coverage fields should be in decimals and not in %, i.e. 0.3 instead of 30%.
Also, keep in mind that the tool doesn’t include any data. Hence, you need to supply your portfolio, target and fundamental data.
Alternatively, run the tool using one of the Google Colab Notebooks that we have created. They usually provide a bit more information about the error and lets you run the code in steps, so that you can see where it fails.
You find full documentation for the tool here: http://getting-started.sbti-tool.org/