PC Client Troubleshooting Guide for CBT Participants
Source: stellasora.global/news/1772

Dear Tyrant,
If you played during the Closed Beta Test (CBT) and now have problems after installing the official PC client, like unable to login, please do the following:
1. Uninstall the Closed Beta Test PC client from your computer.
2. Open the folder where the Closed Beta PC client was installed and delete any leftover files.
3. Download and install the new official launcher from the homepage.
These steps will help fix the issues and get you ready for the official launch.
If you have any other questions or run into issues, our customer support team is here to help! Feel free to reach out to us at [email protected].
Stella Sora Team