Fix

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

apps/dav/lib/Search/ContactsSearchProvider.php

@@ -115,7 +115,7 @@ public function search(IUser $user, ISearchQuery $query): SearchResult {
 			$result->addAttribute("displayName", $title);
 			$result->addAttribute("email", $subline);
 			$result->addAttribute("phoneNumber", (string)$vCard->TEL);
-			$result->addAttribute("uid", $vCard->UID);
+			$result->addAttribute("uid", (string) $vCard->UID);
 
 			return $result;
 		}, $searchResults);