Issue with Menus/Navigation

When I go to edit my Menu Navigation I run into the “There has been a critical error on this website. Please check your site admin email inbox for instructions.”

I took a look at the error log and it says Undefined array key “object” in the customized navigation setting. I tried messing around and getting rid of any additions that could be causing it but it doesn’t seem to be working

Is there somewhere else I should be looking to resolve the issue? The site is hosted on Bluehost and I also am using a plugin. It doesn’t seem to affect the appearance but I am not sure if it will affect anything else.