While utilizing the entity_tasks module on Drupal 10 and PHP 8.1, an error was detected related to a deprecated function. The error throws a message indicating an undefined function called from within the EntityTasksBlock class.
Error: Call to undefined function Drupal\entity_tasks\Plugin\Block\drupal_get_path() in Drupal\entity_tasks\Plugin\Block\EntityTasksBlock->build() (line 124 of modules/contrib/entity_tasks/src/Plugin/Block/EntityTasksBlock.php).
To fix this, the old function call needs to be replaced with the updated method of getting the module's path. The new approach involves calling a service provided by Drupal:
\Drupal::service('extension.list.module')->getPath('entity_task')
2.0
Code
I leave here a patch to make that change on the EntityTasksBlock.php file.
I tested this and works as expected, there was a WSOD before applying the patch, not anymore, but I don't see any listed tasks anywhere
The patch was cleanly applied and the issue was exist. it was solved by above patch. Move to RTBC.