The specified library "claro/tabbingmanager" does not exist

Problem/Motivation

Installed latest version of the 3.0 branch to a site. Trying to login causes a fatal error:

Drupal\Core\Asset\Exception\InvalidLibrariesExtendSpecificationException: The specified library "claro/tabbingmanager" does not exist. in Drupal\Core\Asset\LibraryDiscoveryCollector->applyLibrariesExtend() (line 154 of core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php).

I can't see any evidence that this library exists.

Steps to reproduce

See above.