Warning: Trying to access array offset on value of type null in Drupal\block_class\Service\BlockClassHelperService->validateDynamicClasses()

Makes sense this verification

Moved to the dev branch

Thanks a lot for your contribution

New release with that: https://www.drupal.org/project/block_class/releases/2.0.5

Different error in 2.0.5

The website encountered an unexpected error. Please try again later.
Error: Cannot unset offset in a non-array variable in Drupal\block_class\Service\BlockClassHelperService->validateDynamicClasses() (line 961 of modules/contrib/block_class/src/Service/BlockClassHelperService.php).
Drupal\block_class\Service\BlockClassHelperService->validateDynamicClasses(Array, Object, Object) (Line: 903)
Drupal\block_class\Service\BlockClassHelperService->blockClassFormValidate(Array, Object) (Line: 145)
block_class_form_block_form_validate(Array, Object)
call_user_func_array('block_class_form_block_form_validate', Array) (Line: 82)
Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object) (Line: 275)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object, 'block_form') (Line: 118)
Drupal\Core\Form\FormValidator->validateForm('block_form', Array, Object) (Line: 588)
Drupal\Core\Form\FormBuilder->processForm('block_form', Array, Object) (Line: 320)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48)
Drupal\Core\Entity\EntityFormBuilder->getForm(Object) (Line: 27)
Drupal\block\Controller\BlockAddController->blockAddConfigureForm('block_content:77f99b35-8f98-427e-bba8-e8bc3dddb793', 'landing2_frontend')
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 564)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 159)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 81)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->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: 130)
Drupal\cdn\StackMiddleware\DuplicateContentPreventionMiddleware->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: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 709)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

I have the same issue as trickfun, shouldn't we open a new issue?

Moved the fix to the 2.0.x-dev dev branch

@trickfun and @ericdsd could you see if it was solved now, please?

Fixed.
Thank you

Awesome. Thanks

Launched the new release with the fix: 2.0.6

Thanks a lot, it's fixed for me too.