diff --git a/lib/Db/CacheActorsRequest.php b/lib/Db/CacheActorsRequest.php
index ee54c7d2..4abfe820 100644
--- a/lib/Db/CacheActorsRequest.php
+++ b/lib/Db/CacheActorsRequest.php
@@ -242,7 +242,7 @@ class CacheActorsRequest extends CacheActorsRequestBuilder {
 		$cursor->closeCursor();
 
 		if ($data === false) {
-			throw new CacheActorDoesNotExistException();
+			throw new CacheActorDoesNotExistException('Unknown account \'' . $account . "'");
 		}
 
 		return $this->parseCacheActorsSelectSql($data);
diff --git a/lib/webfinger.php b/lib/webfinger.php
index f4f1f426..2cf5a78a 100644
--- a/lib/webfinger.php
+++ b/lib/webfinger.php
@@ -54,17 +54,17 @@ if ($type !== 'acct') {
 
 
 list($username, $instance) = explode('@', $account);
-
 try {
 	$cacheActorService = OC::$server->query(CacheActorService::class);
 	$configService = OC::$server->query(ConfigService::class);
 
 	if ($configService->getCloudAddress(true) !== $instance) {
-		throw new Exception();
+		throw new Exception('instance is ' . $instance . ', expected ' . $configService->getCloudAddress(true));
 	}
 
 	$cacheActorService->getFromLocalAccount($username);
 } catch (Exception $e) {
+	OC::$server->getLogger()->log(1, 'Exception on webfinger - ' . $e->getMessage());
 	http_response_code(404);
 	exit;
 }