I only see a white page when hitting https://mbeauty.onrender.com/ There also seems to be in an error in the browser console, which you may need to check.
There will always be differences between environments development mode/Local, production mode/Render, etc. These differences need to be considered and configured as required for your own app in each environment. Every app is different, their purpose, style & implementation can vary wildly so you need to provide as much detail as possible when asking for help.