Windows
%temp%\Authentic8\session.log
For Windows client versions 2.9.14 and later, the logs are given the following filename pattern:session-2020-09-09-wed-00-00-00.log.
macOS
~/Library/Logs/com.authentic8.launcher.log
For macOS client versions 3.10.0 and later, the logs are given the following filename pattern: com.authentic8.launcher2020-09-11_10-00-00.log.
Please contact Support for any additional questions