Broken Aria Menu via Wavechecker for Bootstrap Dropdown Menus

Hello,

Recently my university has instructed my team with designing a new website. We are getting close to launch and are focusing our efforts on accessibility via web-aim wave checker. For some reason, I can’t seem to fix this problem with “broken” aria menus. Here is the wavechecker view I am referring to. It says specifically for each dropdown: “Broken ARIA menu – An ARIA menu does not contain required menu items.” Since this menu is just selected as the main menu in the WordPress dashboard, I do not know how to fix this problem. It could be related to bootstrap but I find it happening across different versions.

The theme we are using is WP Bootstrap Starter.

Note:
I think I could use javascript to insert “role=menu” in the drop down.
I could remove the main menu option and write my own menu in php, but this is not really a viable option because our menu changes quite often.

Any help would be highly appreciated.

The page I need help with: [log in to see the link]