Steps to reproduce:
1. Create a repository and upload an artifact (so we can access the native ui of the repository).
2. logout or open a new incognito screen.
3. login to Artifactory by accessing 'http://localhost:8081/artifactory/test-repository' (through the native browser).
4. Try to logout.
It seems that the issue is related to not saving the session correctly.
Please see the gif link below of how I reproduced it and the additional screenshots from the output of the logout response in browser developer console.