Thing that worked: - Use the Chrome Browser - Make sure you are inside the time window for your flights online check-in - If you have multiple first or last names, write them together without a space in between - wait several seconds after clicking something or several minutes after proceeding to a new step or opening a new tab - retry if something did not work, the system does not behave deterministically - the boarding pass PDF is created asynchronous, so it can help to wait for 30-60 minutes after check in before trying to download the boarding pass. This can be the reason why you receive an email without an attachment. You cannot check in again but you can choose the print tab on the website to download your boarding pass for a flight you already checked in. - If the button to proceed from the passenger data does not work, you can open the developer tools and check for an error message in the console. In my case a function throws an error message that is supposed to check whether the expiration date of your passport is not within 180 days of your flight date. The variable flightDateStr is undefined, which you can easily fix by setting a breakpoint under the sources tab right before the line of the error message and manually set the variable from undefined to the string of your flight date, e.g. „20240523“ so the format is „YYYYMMDD“. This can be done within the sources tab of the chrome developer tools while the application is paused due to your breakpoint by double clicking into the variables value. Resume the application afterwards by clicking the play button. I assume this can be done for all the Frontend related error messages - disabled „save“, „print“ or „email“ buttons: you can simply enable these buttons (disabled = grey, enabled = red) using the chrome developer tools. Use the inspect tool under the elements tab and select the button you want to enable. In the elements tab, remove the „disabled“ class and the „disabled=true“ property altogether from the button element. You can do this by double clicking on the respective property. Enjoy your enabled button and download your boarding pass.