If you have launched your Google Antigravity IDE recently only to be hit with the error “This version of Antigravity is no longer supported. Please update to receive the latest features”, you are not alone. This error has frustrated thousands of developers, effectively locking them out of their AI-powered coding environment.
Whether you are using the Windows desktop app, the Linux client, or the VS Code extension, this error indicates a “hard deprecation” of your current client version. Unlike a soft warning, this error prevents the application from connecting to Google’s Gemini backend, rendering the IDE useless until resolved.
In this guide, we will walk you through exactly why this is happening and provide four proven methods to fix it—ranging from a simple clean update to advanced cache clearing for those stuck in an “update loop.”
What Causes This Error?
Before we dive into the fixes, it helps to understand why your software stopped working overnight. Google Antigravity is a rapidly evolving AI-first IDE. Because it relies heavily on server-side models (like Gemini Pro and Ultra), the client on your computer must be perfectly synced with Google’s backend APIs.
The error occurs for one of three reasons:
- Mandatory Security Patch: The backend API has changed, and older clients can no longer authenticate securely.
- Corrupted Update Cache: Your computer thinks it has updated, but it is actually reloading the old, cached version of the app state.
- Package Manager Conflict (Linux): Your
aptorsnaprepository is pointing to a stale release channel.
Method 1: The “Clean” Reinstall (Best for Windows/Mac)
Most users try to update by clicking the “Update” button inside the app. If that fails or loops back to the same error, you need a Clean Reinstall. Overwriting the old file often leaves behind the corrupted configuration that is causing the error.
Step-by-Step Instructions:
- Uninstall the Current App:
- Windows: Go to Settings > Apps > Installed Apps, find “Google Antigravity,” and click Uninstall.
- Mac: Open Finder, go to Applications, and drag “Antigravity” to the Trash. Empty the Trash.
- Download the Latest Installer:
- Navigate strictly to the official portal:
antigravity.google/download. - Warning: Do not download from third-party file hosting sites, as they often host outdated builds.
- Navigate strictly to the official portal:
- Run as Administrator:
- On Windows, right-click the installer and select Run as Administrator. This ensures the new registry keys are written correctly, overriding the old “unsupported” flags.
Pro Tip: After reinstalling, restart your computer before launching the app. This flushes any temporary memory hooks that might be holding onto the old process.
Method 2: Fixing the “Update Loop” (Clear App Data)
If you reinstalled the app but still see the error, your computer is likely loading a “zombie” state from your local cache. The application files are new, but the user data (which tracks your version history) is old. You need to purge this data.
For Windows Users:
- Close Antigravity completely.
- Press
Win + Ron your keyboard to open the Run dialog. - Type
%APPDATA%and press Enter. - Locate the folder named Antigravity or Google Antigravity.
- Delete this entire folder.
- Repeat the step for
%LOCALAPPDATA%if a folder exists there. - Relaunch the app. It will treat you as a new user and pull the latest version manifest.
For Mac Users:
- Open Finder and press
Cmd + Shift + G. - Paste this path:
~/Library/Application Support/ - Find the Antigravity folder and move it to Trash.
- Also check
~/Library/Caches/for any Antigravity-related folders and delete them.
Method 3: The Linux Fix (APT/Repository Error)
Linux users (specifically Ubuntu/Debian) face a unique version of this error. Often, the package manager (apt) holds onto a cached list of versions, refusing to see the new update even after you run sudo apt update.
The Terminal Solution
If you installed Antigravity via the command line, follow these steps to force a cache refresh:
1. Remove the Cached Package Lists:
Open your terminal and run the following command to delete the stuck cache file for the Antigravity repository:
Bash
sudo rm /var/lib/apt/lists/us-central1-apt.pkg.dev_projects_antigravity-*
2. Force a Clean Update:
Tell apt to ignore its local cache and fetch fresh data from the Google servers:
Bash
sudo apt-get -o Acquire::http::No-Cache=true -o Acquire::https::No-Cache=true update
3. Install the Latest Version:
Now, run the install command again. It should detect the new version (e.g., 1.15.x or higher).
Bash
sudo apt-get install google-antigravity
Method 4: Check for “Agent Manager” Conflicts
Antigravity uses a background process called the “Agent Manager” to handle AI requests. Sometimes, an orphaned “Agent” process from the old version remains running in the background, telling the UI that it is outdated.
How to Kill Zombie Processes:
- Windows: Open Task Manager (
Ctrl + Shift + Esc). Look for any process namedantigravity-agent.exe,node, orGoogle Antigravity. Right-click and select End Task for all of them. - Mac/Linux: Open your terminal and run:Bash
pkill -f antigravityOnce the background processes are dead, relaunch the application.
Summary of Fixes
| Method | Best Used For | Success Rate |
| Clean Reinstall | First-time error occurrence | High |
| Purge AppData | “Update Loop” (Error persists after reinstall) | Very High |
| APT Cache Clear | Linux/Ubuntu users | 100% for Linux |
| Kill Process | If the app won’t close or update installs fail | Moderate |
Frequently Asked Questions (FAQ)
1. Will I lose my code if I uninstall Antigravity?
No. Your code files are stored on your local disk (usually in your project folders), not inside the application itself. Uninstalling the IDE only removes the tool, not your projects. However, you may lose your workspace settings (theme, keybindings) if you delete the %APPDATA% folder, so back those up if possible.
2. I updated, but now I get a “Login Failed” error. Why?
This is common after a major update. The authentication token from the old version is invalid. Simply log out of your Google account inside the IDE and log back in. If that fails, clear your default browser’s cache and cookies, as Antigravity uses your browser for authentication.
3. Can I just disable updates to keep using the old version?
No. This specific error (“Version no longer supported”) is a server-side block. Google has disabled the API endpoints that the old version speaks to. Even if you tricked the app into opening, the AI features (chat, code generation) would not work.
4. Is “Antigravity” the same as Project IDX?
They are related but distinct. Project IDX is a browser-based cloud IDE. Antigravity typically refers to the desktop client or the specific AI-integrated VS Code fork. However, they share the same backend infrastructure, so outages often affect both.
5. Why does this happen so often?
AI-native IDEs are experimental software. The underlying models (Gemini) change specs frequently (e.g., input token limits, context windows). To support these new capabilities, the client software must be updated aggressively.
6. Where can I find the official changelog?
You can usually find the release notes inside the application under Help > Release Notes or on the antigravity.google developer portal.
7. Does using a VPN fix this?
Generally, no. This is a version issue, not a region issue. However, if you are in a restricted country and the update server is blocked, a VPN might help you download the update, but it won’t fix the error itself without the new file.
8. I am on Linux and apt-get fails. What now?
If the repository is broken, download the .deb or .rpm file directly from the website and install it manually using sudo dpkg -i filename.deb. This bypasses the package manager cache entirely.
Conclusion
The “This version of Antigravity is no longer supported” error is a mandatory roadblock, but it is easily passable. It simply means your tool has fallen out of sync with the cloud AI engine.
For most users, a clean reinstall is the silver bullet. If you are a power user or on Linux, you likely need to clear your package cache or app data folders.
Your Next Step:
Before you do anything else, open your Task Manager (or Terminal) and ensure every instance of Antigravity is fully closed. Then, try Method 2 (Purge AppData), as this is the most common reason the error persists even after downloading a new installer.
Get back to coding, and enjoy the latest features.