Error with latest version

also this:
Warning: Trying to access array offset on null in git_deploy_system_info_alter() (line 106 of modules/contrib/git_deploy/git_deploy.module).

git_deploy_system_info_alter(Array, Object, 'module') (Line: 552)
Drupal\Core\Extension\ModuleHandler->alter('system_info', Array, Object, 'module') (Line: 321)
Drupal\Core\Extension\ExtensionList->doList() (Line: 155)
Drupal\Core\Extension\ModuleExtensionList->doList() (Line: 283)
Drupal\Core\Extension\ExtensionList->getList() (Line: 154)
Drupal\update\UpdateManager->getProjects() (Line: 278)
update_get_available(1) (Line: 84)
Drupal\update\Form\UpdateManagerUpdate->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 536)
Drupal\Core\Form\FormBuilder->retrieveForm('update_manager_update_form', Object) (Line: 284)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Hi @maxilein,

I have fixed this issue "Error with latest version" and also attached patch ,
kindly review and verify.

I haven't löooked at your code other than the patch, but are you sure that

... && $available[$project_name]['releases'][$upstream['last_tag']]['date']

does not need a check with isset?

Tested with D 10.3.1 php 8.3 - the error is gone.
Thank you