The issue causing the error message has since been resolved, and you are able to calculate your period again. Our apologies for the inconvenience.
Posted Nov 21, 2023 - 15:14 CET
When calculating the period, an error message may come up. We are currently investigating this message. Sometimes it helps to wait a few minutes and try again. In some cases it then succeeds in calculating the period. Our apologies for the inconvenience.