Greetings Alexander!
Thank you for contacting The Elder Scrolls Online Team.
I apologize for the inconvenience that this error 301 may have caused you.Here is a work around that may be work for you. Please be aware that this issue can have a different causes and solution.
1. Log out of the game
2.Log in to your account on hppts://account.elderscrollsonline.com
3. Sign the new TOS agreement
4. Log back into the game and enjoy it
If these steps doesn't solve your issue your issue can be connection related. Would you be so kind to reboot router/modem and connect your computer via cable (not wireless).
Additionally, if you haven't done it already, you can (5) Open Ports by checking that you have added the "Bethesda_launcher", as well as "eso.exe" to your Antivirus/Firewall exception rules and that your Firewall has not blocked access through the following ports (if your PC does not have an Antivirus, Windows sometimes has a simple one by default. Follow the same steps for it as well as Windows Firewall):
• TCP / UDP Ports 24100 through 24131
• TCP / UDP Ports 24500 through 24507
• TCP / UDP Ports 49100 through 54000
Finally, try a (6) clean boot to disable background programs that could potentially be blocking the connection by following this procedure:
- Click Start and type msconfig in the search box
- Right click on the msconfig.exe program and choose "Run as administrator"
- On the General Tab at the top, click on the Selective startup radio button
- Uncheck "Load startup items"
- Click on the Services tab and check the "Hide all Microsoft services" box
- Click the "Disable all" button at the bottom
- Click Apply, then click OK
- Restart your computer
When your computer boots up again, it will be in selective startup. Try the game again, and see if you have different results. Once you have tried the game, if everything works fine, then one of the service or startup programs was causing the issues.
Once you have finished this troubleshooting, turn selective startup back off. This is done by opening the msconfig window again and selecting the Normal startup radio button. Click Apply, then click OK, and restart the computer again. For more detailed instructions on this process, visit the Microsoft support page here:
http://support.microsoft.com/kb/929135
Thank you for your continued interest and support!
Warm Regards,
The Elder Scrolls Online Team