Fix Minecraft "Failed to Login: Invalid Session"
Failed to login: Invalid sessionBad loginInvalid session (try restarting your game)"Invalid session" means the server asked Mojang/Microsoft to verify your account and the check failed — usually a stale login session. Here's the quick client fix and the server-side cause.
The instant fix: restart the launcher
Nine times out of ten this is a stale session token. Fully close the Minecraft launcher and the game, reopen the launcher, and let it re-authenticate your Microsoft account. Then rejoin.
Still failing? Re-login your account
Sign out of your Microsoft account in the launcher and sign back in to force a fresh token. This clears a session that expired in the background.
The server side: online-mode
Servers with online-mode=true (the default) verify every player with Mojang. That's correct and secure. If the server runs online-mode=false (offline/cracked), authentication is skipped entirely — which has real downsides:
# server.properties
online-mode=true # verifies accounts (recommended)online-mode=false lets anyone join under any username — including impersonating your admins — and offers no account security. Keep it true unless you specifically need offline play, and even then use a whitelist.
Other quick checks
- Check the Mojang/Minecraft services aren't down.
- If you just changed your username, wait — the change can take time to propagate.
- Make sure your system clock is correct (a wrong clock breaks auth).
"Invalid session" is a stale login. Restart the launcher to re-authenticate — it fixes it almost every time.
Minecraft is a trademark of Mojang Synergies AB / Microsoft. ESAGAMES is an independent hosting provider, not affiliated with or endorsed by Mojang or Microsoft.
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Frequently asked questions
How do I fix "Failed to login: Invalid session"?
Fully close the game and the launcher, reopen the launcher so it re-authenticates your Microsoft account, then rejoin. If that fails, sign out and back in to force a fresh session token.
Is "invalid session" a server problem?
Usually not — it's your login session that's stale. But a server running online-mode in a misconfigured way, or Mojang services being down, can also cause it. Restart the launcher first.
Should my server use online-mode=false?
Only if you specifically need offline play, and even then add a whitelist. online-mode=false skips account verification, so anyone can join under any name, including impersonating staff. Keep it true when you can.
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