We recently upgraded our root SharePoint site from a classic to Modern site. In our previous sites, we used managed/structured navigation for ease of use, simplicity, etc.
In the new modern site, we have tried to activate publishing so that we may create a structured navigation. However, when we do so, we get the below error. I have done a ton of research on the topic and it seems that managed navigation is finally supported, but we still are having trouble activating the feature.