@malcolmhagger

If you experience Error 303 when logging in, you should forward certain ports to ensure that your console is able to reach our servers.

PlayStation 4 Ports:

• TCP Ports 10040 through 10060
• UDP Ports 50000 through 60000
• UDP Ports 12000 through 32000
• UDP Port 6250
• UDP Port 5060
• UDP Port 5062
• UDP Port 3478 through 3479
• TCP Port 80
• TCP Port 433

In addition to the above, deleting your ESO saved data file can help resolve this error. Please be aware that deleting the save data will only reset your Options settings, and that no character data or game progress will be affected.

To delete save data on the PlayStation 4:

1. From the PlayStation Dynamic Menu, navigate to Settings.
2. Go to Application Saved Data.
3. Click on Saved Data in System Storage
4. Select "Delete"
5. Select The Elder Scrolls Online.
6. Place ticks next to the data you wish to delete on the ESO Save Data.
7. Select [Delete] and then select [OK] to confirm your decision.

After you have cleared your game save data, restart your console and try logging back into the game.