Here are additional required steps for your server to run.
1. Shutdown the game server.
2. Start the game on your local computer.
3. Open the console on your local computer. To access the console press the tield key (~)
4. Copy and Paste the following into your console........
TheNet:GenerateClusterToken()
5. Locate the file on your computer called C:\Users\YOURUSERNAME\Documents\Klei\DoNotStarveTogether\cluster_token.txt
6. Upload and overwrite this file to your servers directory using the FTP Manager. The location should look like this. YOURSAVEDATA\DoNotStarveTogether\CLANHOST\cluster_token.txt
7. Start your Server. This will add you as Admin.