Google Antigravity Force Update Error Fix (2026) - Complete Gemini 3 Version Upgrade Guide

TL;DR: Getting “This version of Antigravity is no longer supported” error? This guide provides solutions for official client updates, third-party tool configurations, and Linux/WSL2 environment fixes.

The Problem

When using Google Antigravity (Google’s “agent-first” AI IDE released in November 2025), you might encounter this error:

This version of Antigravity is no longer supported.
Please update to receive the latest features!
Build • gemini-3-flash-preview • interrupted

This indicates that your current client version is outdated, and Google has forcibly disconnected support for older versions on the server side.

Why Does This Happen?

The gemini-3-flash-preview in the error message indicates the model is in a rapidly iterating preview stage.

Primary Causes

Solutions

Solution 1: Official IDE Client Update

If you’re using the Antigravity desktop client (Windows/macOS/Linux):

1. Automatic Update (Recommended)

1. Click the gear icon in the bottom-left corner of the IDE
2. Select Check for Updates
3. Follow the prompts to complete the update

2. Force Reinstall (Most Effective)

If automatic update is stuck, perform a fresh install:

1. Visit the official website: antigravity.google
2. Download the latest installer
3. Install over the existing version

3. Linux Manual Update

For Debian/Ubuntu users, run:

sudo apt-get update && sudo apt-get install --only-upgrade antigravity

Solution 2: Third-Party Plugin Configuration Fix

If you’re calling the Antigravity API through third-party tools like OpenCode or Clawdbot, this is usually caused by userAgent validation failure.

Fix Steps

1. Locate the config file: antigravity-accounts.json

2. Update the version number: Modify the userAgent key to the latest version

   {
     "userAgent": "antigravity/1.15.8"
   }

   💡 Try antigravity/1.15.8 or higher

3. Restart the service: Restart your local Gateway or CLI tool after modification

Solution 3: Quota and Model Switching

Sometimes this error is accompanied by false “quota limit reached” reports:

Resolution

1. Switch Models: In settings, switch from Gemini 3 Flash Preview to Gemini 3 Pro Standard

2. Refresh Token Cache:

   • Sign out of Google account
   • Sign back in
   • Force refresh authentication Token

3. Check Quota Status: Visit Google AI Studio to check current quota usage

Solution 4: WSL2/Linux Environment Special Fix

In late January 2026, many users reported receiving this error in WSL2 or Linux environments. This is mainly because the Linux version’s auto-update mechanism is sometimes half a day slower than Windows.

Symlink Fix Commands

If the error persists after updating, try these fixes:

# 1. Backup current configuration
cp -r ~/.config/antigravity ~/.config/antigravity.backup

# 2. Clear cache
rm -rf ~/.cache/antigravity

# 3. Rebuild Symlink (if using AppImage)
ln -sf /opt/antigravity/antigravity.AppImage /usr/local/bin/antigravity

# 4. Re-authenticate
antigravity auth login

Troubleshoot Plugin Conflicts

If the above methods don’t work, try disabling all third-party MCP Servers:

# Temporarily move MCP config
mv ~/.config/antigravity/mcp-servers.json ~/.config/antigravity/mcp-servers.json.bak

# Restart Antigravity
antigravity

If the issue is resolved, enable MCP Servers one by one to identify the conflicting plugin.

Prevention Measures

Stay Updated

• Enable Auto-Update: Turn on the auto-update feature in settings
• Follow Official Announcements: Subscribe to Google Antigravity Blog

Version Compatibility Check

Before each major version update, check:

FAQ

Q: Can’t open old projects after update?

A: This might be due to project configuration format changes. Try:

1. Backup project files
2. Create a new project with the same name using the new version
3. Copy old project files into the new project

Q: All MCP Servers stopped working after update?

A: The new version may have changed the MCP protocol. Solutions:

1. Check if MCP Servers have updates available
2. Review official migration guide
3. Reconfigure MCP Servers

Q: Enterprise account can’t update?

A: Enterprise accounts may be restricted by organization policies:

1. Contact IT administrator
2. Request update permissions
3. Or use a personal account for testing

Summary

While Google Antigravity’s force update mechanism can sometimes be inconvenient, it ensures users have access to the latest Agentic capabilities and security fixes.

Key Takeaways:

• ✅ Prefer official client auto-update
• ✅ Third-party tools: watch userAgent version
• ✅ Linux/WSL2 environments need extra Symlink fixes
• ✅ Disable MCP Servers to troubleshoot plugin conflicts
• ✅ Maintain regular update habits

If the issue persists:

1. Visit Antigravity Official Forum to search for similar issues
2. Submit a bug report on GitHub Issues
3. Contact Google Developer Support

References

• Google Antigravity Official Documentation
• Gemini 3 Model Release Notes
• OpenCode Configuration Guide
• MCP Server Configuration Tutorial

Last Updated: 2026-01-30