joomla4 Taggable not found - SOLVED

Upgrade joomla 3. to joomla 4. run
"Joomla\Plugin\Behaviour\Taggable\Extension\Taggable" not found 

Solution: remove file administrator/cache/autoload_psr4.php 

Detail: https://github.com/joomla/joomla-cms/issues/38474