[BUGFIX] Fix language filter in the mail queue

Classes/Domain/Repository/MailRepository.php

@@ -72,6 +72,7 @@ class MailRepository extends AbstractRepository {
 	 */
 	public function findAllEntries(int $pid = 0, int $limit = NULL, array $filters = []): QueryResultInterface {
 		$query = $this->createQuery();
+		$query->getQuerySettings()->setRespectSysLanguage(FALSE);
 		if ($limit) {
 			$query->setLimit($limit);
 		}
@@ -88,7 +89,7 @@ class MailRepository extends AbstractRepository {
 			$constraintsAnd[] = $query->equals('template_name', $filters['filterTemplate']);
 		}
 
-		$constraintsAnd[] = $query->equals('sys_language_uid', $filters['filterLanguage']);
+		$constraintsAnd[] = $query->equals('sys_language_uid', (int) $filters['filterLanguage']);
 		$constraintsOr = [];
 		if ($filters['filterSearch']) {
 			$search = '%' . $filters['filterSearch'] . '%';