AWS S3 Bucket Configuration (error on refresh of web app)

I have my app hosed on AWS in and S3 bucked. However, when I refresh any page, I get an error ( I believe this is because the AppGyver app’s URL does not include .html.

This same error does not happen with the hosted version, and since my understanding is that AppGyver hosts our apps on AWS S3, there must be a configuration I am missing on S3 that is causing this error.

Can someone please help point me to a solution?

Thank you!

Hi @Harri_Sarsa or @Mari would you have any insight here please?

Thank you!