Missing proxy class 'Drupal\book_tree_menu\ProxyClass\oscBookManager' for lazy service 'book.manager

Yes, this is needed, but in the patch provided you had the proxy class extend from BookManager, but I'm not sure why. I don't think you need to overwrite anything at all from what the script created. I created a Merge Request with the unaltered code of the created proxy class.

Also bumping to major as this is needed for Drupal 10.2.x.

Creating a patch to add the file generated by the script.

Patch #6 worked for me - the warning "Missing proxy class 'Drupal\book_tree_menu\ProxyClass\oscBookManager' for lazy service 'book.manager'" was previously appearing after every drush cr, it's gone after applying the patch.

My Drupal version is 10.3.10 and book version 2.0.0-alpha5.
After the initial install I got the error. I deinstalled the module. I patched the module with the patch of #6 and installed it again. Now I get this error:
PHP Fatal error: Declaration of Drupal\\book_tree_menu\\ProxyClass\\oscBookManager::bookTreeAllData($bid, $link = null, $max_depth = null) must be compatible with Drupal\\book\\BookManagerInterface::bookTreeAllData(int $bid, ?array $link = null, ?int $max_depth = null, ?int $min_depth = null): array in /xxx/web/modules/contrib/book_tree_menu/src/ProxyClass/oscBookManager.php on line 72', referer: https://example.com/admin/modules

And many more interface differences.

Reroll patch for D10.4.4

Hi, this became an issue for our site today. Not sure if there was a recent update that made this patch necessary again, but I applied the patch and it resolved the issue.

I feel like I've had to apply the recommended php command in the past to fix the issue, this time, the patch was what was needed. Can it be merged into the official code so this bug stops happening?

Thank you for everyone's work on this fix :)

Please upgrade to 3.0.1 and contributed module Book 2.0.0