Error 103003 in Escape from Tarkov typically indicates a backend communication failure (Bad Gateway/Access Denied). It means your client cannot handshake with the main authentication server.
Because Tarkov servers are notoriously unstable, this is frequently a server-side issue, but it can also be a corrupted local cache.
Here is the troubleshooting order, starting with the most likely culprit:
1. The “Is It Just Me?” Check
Before you start deleting files, confirm the servers aren’t down.
Check the Status Page: Go to status.escapefromtarkov.com. specifically look for “Authentication” or “Launcher” status.
Note: The official page is slow to update. If you see a spike of reports on Twitter/X or DownDetector, the issue is on their end and you just have to wait.
2. The Launcher Fixes (Most Effective)
If servers are up, your local launcher cache is likely corrupted.
Clear Cache:
Open the BSG Launcher.
Click the arrow under your profile name (top right).
Select Settings > Clear cache.
Integrity Check:
In the Launcher, click the arrow under your profile name again.
Select Integrity check.
Let it run (this takes a few minutes).
Also read : The Number of Requests Sent Exceeds the Quota Limit
3. The Permissions Fix
Error 103003 often triggers because Windows blocked the launcher from updating a specific temp file.
Close the Launcher and the game completely (check Task Manager to ensure
BsgLauncher.exeisn’t running).Right-click the BsgLauncher shortcut.
Select Run as administrator.
4. The Network/DNS Fix
If you are still stuck, your ISP might be struggling to route to the specific authentication server (common with Tarkov).
Flush DNS: Open Command Prompt as Admin and type
ipconfig /flushdns.Change DNS: Set your PC’s DNS to Cloudflare (1.1.1.1) or Google (8.8.8.8).
The “VPN Kick”: If you have a VPN, turn it ON and try to launch. If it works, you can turn it off once you are in the menu. This forces a new routing path to the auth server.
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