The website encountered an unexpected error. Please try again later.
TypeError: array_keys(): Argument #1 ($array) must be of type array, string given in array_keys() (line 313 of modules/contrib/xls_serialization/src/Encoder/Xls.php).
array_keys('No route found for "GET /en/export/1260" (from "https://physics.ifmo.ru/en/export/1260?page&_format=xlsx")') (Line: 313) Drupal\xls_serialization\Encoder\Xls->extractHeaders(Array, Array) (Line: 169) Drupal\xls_serialization\Encoder\Xls->setHeaders(Object, Array, Array) (Line: 75) Drupal\xls_serialization\Encoder\Xls->encode(Array, 'xlsx', Array) (Line: 40) Symfony\Component\Serializer\Encoder\ChainEncoder->encode(Array, 'xlsx', Array) (Line: 306) Symfony\Component\Serializer\Serializer->encode(Array, 'xlsx', Array) (Line: 129) Symfony\Component\Serializer\Serializer->serialize(Array, 'xlsx') (Line: 77) Drupal\serialization\EventSubscriber\DefaultExceptionSubscriber->on4xx(Object) (Line: 112) Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException(Object, 'kernel.exception', Object) call_user_func(Array, Object, 'kernel.exception', Object) (Line: 142) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.exception') (Line: 229) Symfony\Component\HttpKernel\HttpKernel->handleThrowable(Object, Object, 1) (Line: 92) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 54) Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->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: 49) Asm89\Stack\Cors->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: 718) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)