diff --git a/apps/federatedfilesharing/lib/OCM/CloudFederationProviderFiles.php b/apps/federatedfilesharing/lib/OCM/CloudFederationProviderFiles.php
index 477943b97caf9..7f1acbdf51637 100644
--- a/apps/federatedfilesharing/lib/OCM/CloudFederationProviderFiles.php
+++ b/apps/federatedfilesharing/lib/OCM/CloudFederationProviderFiles.php
@@ -61,6 +61,7 @@
 use OCP\Share\IShare;
 use OCP\Util;
 use Psr\Container\ContainerExceptionInterface;
+use Psr\Log\LoggerInterface;
 
 class CloudFederationProviderFiles implements ICloudFederationProvider {
 
@@ -842,8 +843,11 @@ private function getUserDisplayName(string $userId): string {
 
 		try {
 			$slaveService = Server::get(\OCA\GlobalSiteSelector\Service\SlaveService::class);
-		} catch (ContainerExceptionInterface $e) {
-			\OC::$server->getLogger()->logException($e);
+		} catch (\Throwable $e) {
+			Server::get(LoggerInterface::class)->error(
+				$e->getMessage(),
+				['exception' => $e]
+			);
 			return '';
 		}
 
diff --git a/apps/files_sharing/lib/Controller/ShareAPIController.php b/apps/files_sharing/lib/Controller/ShareAPIController.php
index 2daa31a6886bc..f381a6dd2652b 100644
--- a/apps/files_sharing/lib/Controller/ShareAPIController.php
+++ b/apps/files_sharing/lib/Controller/ShareAPIController.php
@@ -81,6 +81,8 @@
 use OCP\Share\IManager;
 use OCP\Share\IShare;
 use OCP\UserStatus\IManager as IUserStatusManager;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Log\LoggerInterface;
 
 /**
  * Class Share20OCS
@@ -345,11 +347,20 @@ protected function formatShare(IShare $share, Node $recipientNode = null): array
 	 */
 	private function getDisplayNameFromAddressBook(string $query, string $property): string {
 		// FIXME: If we inject the contacts manager it gets initialized before any address books are registered
-		$result = \OC::$server->getContactsManager()->search($query, [$property], [
-			'limit' => 1,
-			'enumeration' => false,
-			'strict_search' => true,
-		]);
+		try {
+			$result = \OC::$server->getContactsManager()->search($query, [$property], [
+				'limit' => 1,
+				'enumeration' => false,
+				'strict_search' => true,
+			]);
+		} catch (Exception $e) {
+			Server::get(LoggerInterface::class)->error(
+				$e->getMessage(),
+				['exception' => $e]
+			);
+			return '';
+		}
+
 		foreach ($result as $r) {
 			foreach ($r[$property] as $value) {
 				if ($value === $query && $r['FN']) {
@@ -372,7 +383,9 @@ private function fixMissingDisplayName(array $shares, ?array $updatedDisplayName
 		$userIds = $updated = [];
 		foreach ($shares as $share) {
 			// share is federated and share have no display name yet
-			if ($share['share_type'] === IShare::TYPE_REMOTE && $share['share_with_displayname'] === '') {
+			if ($share['share_type'] === IShare::TYPE_REMOTE
+				&& ($share['share_with'] ?? '') !== ''
+				&& ($share['share_with_displayname'] ?? '') === '') {
 				$userIds[] = $userId = $share['share_with'];
 
 				if ($updatedDisplayName !== null && array_key_exists($userId, $updatedDisplayName)) {
@@ -410,8 +423,7 @@ private function fixMissingDisplayName(array $shares, ?array $updatedDisplayName
 	 * @param bool $cacheOnly - do not reach LUS, get data from cache.
 	 *
 	 * @return array
-	 * @psalm-suppress DeprecatedMethod
-	 * @psalm-suppress UndefinedClass
+	 * @throws ContainerExceptionInterface
 	 */
 	private function retrieveFederatedDisplayName(array $userIds, bool $cacheOnly = false): array {
 		// check if gss is enabled and available
@@ -423,8 +435,11 @@ private function retrieveFederatedDisplayName(array $userIds, bool $cacheOnly =
 
 		try {
 			$slaveService = Server::get(\OCA\GlobalSiteSelector\Service\SlaveService::class);
-		} catch (Exception $e) {
-			\OC::$server->getLogger()->logException($e);
+		} catch (\Throwable $e) {
+			Server::get(LoggerInterface::class)->error(
+				$e->getMessage(),
+				['exception' => $e]
+			);
 			return [];
 		}
 
diff --git a/psalm.xml b/psalm.xml
index dac8635b5be4a..e76226ab4f2dc 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -83,6 +83,7 @@
 			<errorLevel type="suppress">
 				<referencedClass name="OCA\GroupFolders\Mount\GroupFolderStorage"/>
 				<referencedClass name="OCA\TwoFactorNextcloudNotification\Controller\APIController"/>
+				<referencedClass name="OCA\GlobalSiteSelector\Service\SlaveService"/>
 			</errorLevel>
 		</UndefinedClass>
 		<UndefinedFunction>
@@ -126,6 +127,7 @@
 				<!-- Helper classes for sharing API integration from other apps -->
 				<referencedClass name="OCA\Deck\Sharing\ShareAPIHelper" />
 				<referencedClass name="OCA\Talk\Share\Helper\DeletedShareAPIController" />
+				<referencedClass name="OCA\GlobalSiteSelector\Service\SlaveService"/>
 			</errorLevel>
 		</UndefinedDocblockClass>
 	</issueHandlers>