No workout_step messages found by manual import

Hi, this morning I did a short ride on the indoor trainer via Rouvy. The .FIT file was uploaded to Strava without any problems, but it wasn’t transferred to Intervals. After uploading the file manually, I see the following message in Intervals: No workout_step messages found.
The workout was also uploaded directly to Garmin, and I can see the data in Connect. Checking the file in fitfiletools.com also indicates that it is in the file. I have not seen this message before, even though I have often used Rouvy without any problems.
So I am not using the direct link between Rouvy <> Intervals.
Does anyone know what might be going on?
Kind regards,
Guido
Translated with DeepL.com (free version)

It sounds like you are importing the file as a planned workout rather than a completed activity. You need to use the “Upload” button on the calendar page:

How silly… :face_with_open_eyes_and_hand_over_mouth:

Thanks,