Hello @tobias.daum
,
Welcome to Kore Community ![]()
With respect to JWT errors, we believe the JWT token is not generated accurately. Please follow the below post and try again with the recreated JWT. Note that when creating JWT - client secret is also required.
https://test-discourse.kore.ai/t/how-to-generate-jwt-tokens-for-kore-ai-public-apis/2287
There are other JWT related posts that you can verify for the correct process.
For customizations to chatwindow, you can make changes to customTemplate.js and customTemplate.css files of the WebSDK. Further info can be found in our documentation: GitHub - Koredotcom/web-kore-sdk: web client sdk code
chatWindow.css can be taken as reference for the required customizations.
Hope this helps! Thank you for stopping by!!