In order to run the project you should either change the connection string to point to the SQL instance you are using or recreate the context for a Northwind database on your local server. I am attaching the project modified to use some static data.
I also tested the project IE but the menu still seems to be displayed as expected. I attached an image with the Menu on my side. Please verify that there are not any custom styles that would cause the described problem. If the problem persists, I will need a small runnable sample so I can investigated further.
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