After upgrade from 2.4.12 to 2.6 no admin extension

I just upgraded the version from 2.4.12 to 2.6.0 and the entire zextras administration has disappeared from the admin panel.

The strange thing is that the installation has not given a problem, like the other dozens of times ... In the administration extensions panel, the extension appears as enabled but none of the zextras menus are displayed! :confused: