The drinks containing milk aren't available in the main menu
Your WMF 1300S has a pumped milk system that needs priming once the machine has either been cleaned or the milk system has been rinsed. This is to prevent stale milk sitting inside your machine and the pipes once it has been rinsed, prior to switching off.
If you have rinsed your milk system ready for shut down, then you will need to 'release the milk system', which will prime milk back into the pump.
This option is found in your 'Care' menu and the correct button to press is shown in the photo below to reactivate your milk drinks.
Ensure the milk pipe is connected to a full container of fresh milk.
For further help please contact us via this Support Form and raise a ticket.
https://support.amamus.coffee/knowledge/kb-tickets/new