I found this dashboard layout on the MUI website and integrated it into my project, installed all the dependencies, but something strange is happening with the way it handles the main content. No matter how I modify the sidebar, it always tries to route based on the segment. The dashboard is in the /admin folder, and the menu items should point to routes like /admin/tickets and /admin/tools, etc.

I added mui components inside my project, but when i build the files for production, i have large sizes for each pages. this really decrease the performance speed. is there any solution??

I tried

i execute new project, Nextjs, my problem is, afetr i add this two files i get this error i don’t know why: