Authentication Servers Down

Error: Failed to login: The authentication servers are currently down for maintenance
Also: Invalid session, Authentication servers are not reachable

Your launcher couldn’t verify your Microsoft account with Mojang/Microsoft. The wording often says “maintenance,” but the usual cause is a stale session, blocked network path, or wrong system clock - not always an actual Mojang outage.

Quick checks

Check status: DownDetector / Mojang socials. If services are down, wait it out.
Fully quit the launcher (not just the game), reopen, try again.
Log out of the launcher, close it, log back into your Microsoft account.

Fixes

Session / account

Use a Microsoft account. Old Mojang-only accounts need migration via Microsoft.
Sync Windows/macOS date & time (automatic time + timezone).

Network

Turn off VPN/proxy and retry.
Flush DNS, then try Cloudflare DNS (1.1.1.1 / 1.0.0.1).
Allow the Minecraft launcher and Java through firewall/antivirus.

Launcher

Clear launcher session data (e.g. launcher_profiles.json), then log in again.
If it still fails, reinstall the official launcher from minecraft.net/download, or try Prism/CurseForge with the same Microsoft login.

ModdedMC note: Our servers are online-mode. You need a legitimate Microsoft/Minecraft account - offline/cracked clients won’t work.

Who to contact

Can’t log into Microsoft at all: Microsoft Support
Only one server rejects you after a good login: ModdedMC staff (Discord) - may be ban, whitelist, or wrong pack

Related: Connection Reset · Flush DNS