diff --git a/app/src/main/java/io/xpipe/app/browser/file/BrowserFileListComp.java b/app/src/main/java/io/xpipe/app/browser/file/BrowserFileListComp.java
index 6d0c27849..45b9ceae4 100644
--- a/app/src/main/java/io/xpipe/app/browser/file/BrowserFileListComp.java
+++ b/app/src/main/java/io/xpipe/app/browser/file/BrowserFileListComp.java
@@ -189,10 +189,10 @@ public final class BrowserFileListComp extends SimpleComp {
         var m = fileList.getFileSystemModel();
         var user = unix.getUser() != null
                 ? unix.getUser()
-                : m.getCache().getUsers().get(unix.getUid());
+                : m.getCache().getUsers().getOrDefault(unix.getUid(), "?");
         var group = unix.getGroup() != null
                 ? unix.getGroup()
-                : m.getCache().getGroups().get(unix.getGid());
+                : m.getCache().getGroups().getOrDefault(unix.getGid(), "?");
         var uid = String.valueOf(
                         unix.getUid() != null ? unix.getUid() : m.getCache().getUidForUser(user));
         var gid = String.valueOf(
diff --git a/app/src/main/java/io/xpipe/app/browser/fs/OpenFileSystemCache.java b/app/src/main/java/io/xpipe/app/browser/fs/OpenFileSystemCache.java
index 66ac5a467..d936992cf 100644
--- a/app/src/main/java/io/xpipe/app/browser/fs/OpenFileSystemCache.java
+++ b/app/src/main/java/io/xpipe/app/browser/fs/OpenFileSystemCache.java
@@ -58,7 +58,9 @@ public class OpenFileSystemCache extends ShellControlCache {
                 .orElse("");
         lines.lines().forEach(s -> {
             var split = s.split(":");
-            users.putIfAbsent(Integer.parseInt(split[2]), split[0]);
+            try {
+                users.putIfAbsent(Integer.parseInt(split[2]), split[0]);
+            } catch (NumberFormatException ignored) {}
         });
 
         if (users.isEmpty()) {
@@ -77,7 +79,9 @@ public class OpenFileSystemCache extends ShellControlCache {
                 .orElse("");
         lines.lines().forEach(s -> {
             var split = s.split(":");
-            groups.putIfAbsent(Integer.parseInt(split[2]), split[0]);
+            try {
+                groups.putIfAbsent(Integer.parseInt(split[2]), split[0]);
+            } catch (NumberFormatException ignored) {}
         });
 
         if (groups.isEmpty()) {