The front page says "Something happened and the Taiga has captured the error to be able to work on it."

Hi @m3tr0n !
Unfortunately, browsers will happily throw away CORS errors that are not really the cause of the issue you’re experiencing. It’s quite distracting. In order to help you, can you share the details of your deployment? How much did you depart from the instructions shared here?
https://community.taiga.io/t/taiga-30min-setup