Mui does not work with Jira app created with Forge

Hello,

I’ve created a basic custom ui application with forge and I’ve tried to import Mui (https://mui.com/) and add a simple button. I’ve noticed that when I try to display it in Jira, it does not work. However, if I run the react application directly with “npm start” the button’s layout appears correctly.

What specific errors do you see? Could you provide screenshots?

When using MUI, you must declare unsafe-inline in the manifest.yml file.
see https://developer.atlassian.com/platform/forge/manifest-reference/permissions/#:~:text=sha384%2C%20and%20sha512.-,Styles,-The%20styles%20list

Thank you! I will try it!

LE: saitoayumi is right, that is the solution!