Hi @dzgraphicdesign, it looks as if the Navbar in the symbol you are trying to add, has somehow had it’s structure changed, and now the navbar in the symbol no longer has a parent Navbar element.
Take a peek:
https://cl.ly/3N3w0M0u3D2r/Screen%20Recording%202017-10-05%20at%2008.29%20AM.mov
In my video, I show how to re-use the content you have already created to create a new navbar which should fix the problem. Unfortunately, you will need to go to every page having the old navbar and replace that with the new navbar symbol.
I hope this helps.