Calories Adjustment After Being Unwell

Previously my settings were on lose 1 kg a week and 4 30 min workouts a week and the system gave me 1,440 calories a day.

Then I was unwell for a couple of weeks so I couldn't work out so I dropped it down to no workouts and it adjusted to 1,200 calories.

But now I'm well again and want to work out, but when I re-adjust it to 4 x 30 min workouts it stays at 1,200 calories!

Very frustrating how do I fix it?