"oh no" message - Error running app with no errors visible in the console

Hello everyone. I am currently seeing the “oh no” message pop up without any errors in the console. (only warning about serializations for pyarrow which is not the problem). The problem occurs on the “Journey” page of my app when I click the “I am ready” and “GO” buttons. I have also tried rebooting but the same thing happens every time. After reading similar threads I believe this is a memory issue but I would like to know if there is way to see the app’s memory usage with Streamlit to see if I have exceeded the limit (which apparently is 800mb). Either this or some other issue. Can anyone help ?
This the link to my app app