Publish Won't work

I have no idea why, but my publish button is no longer working. When I click publish I am taken to the 404 error page because after I click update or publish the link goes to which does not exist.

I am trying to use the pagebuilder with the visual editor.

I believe this is only happening with PageBuilder and not the traditional visual builder.

Can you help?

You should try disabling some of your plugins and go to Settings > Permalinks and resave. I doubt this is related to the Page Builder plugin.