The no carafe message appears when the filter door has been opened while the carafe is in place.
Can you please try the following in this order: remove the carafe, open the filter door, close the filter door, place the carafe underneath the machine.
Here is a link to a video showing this: https://www.youtube.com/watch?v=f2W938f2qu4
If this does not help, please check if there are any coffee grinds around the carafe detection button, sometimes if a coffee grind gets stuck this can affect the reading also press the button a few times to make sure it is working.
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