If you open the Fddb app and are asked for your personal data such as age, weight, height and gender every time, it can be assumed that there is no longer a weight entry in your profile. As a result, the app is no longer able to calculate your daily requirements. For this reason, you will be asked for this data again and again.
The solution to this is that you have to enter at least one weight entry manually and you are not allowed to delete it. As soon as you save at least one manual weight entry, the problem should no longer occur in the app and the login should work properly.
Please also note that imported weight data from external apps is unfortunately not valid in this case! Such weight entries are only saved locally on your device and not in your profile, i.e. on the server side.