Warning: Uninitialized string offset -1 in Drupal\bibcite_ris\Encoder\RISEncoder->buildEntry() (line 220 of modules/contrib/bibcite/modules/bibcite_ris/src/Encoder/RISEncoder.php).
Drupal\bibcite_ris\Encoder\RISEncoder->buildEntry(Array) (Line: 185)
Drupal\bibcite_ris\Encoder\RISEncoder->Drupal\bibcite_ris\Encoder\{closure}(Array)
array_map(Object, Array) (Line: 184)
Drupal\bibcite_ris\Encoder\RISEncoder->encode(Array, 'ris', Array) (Line: 43)
Symfony\Component\Serializer\Encoder\ChainEncoder->encode(Array, 'ris', Array) (Line: 416)
Symfony\Component\Serializer\Serializer->encode(Array, 'ris', Array) (Line: 141)
Symfony\Component\Serializer\Serializer->serialize(Array, 'ris') (Line: 75)
Drupal\bibcite_export\Controller\ExportController->processExport(Array, Object, 'bibcite_reference-1195-RIS') (Line: 113)
Drupal\bibcite_export\Controller\ExportController->export(Object, 'bibcite_reference', Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 627)
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: 58)
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: 50)
Drupal\ban\BanMiddleware->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: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)