Student or Learner
I have seen this sentence. It is said that there is a mistake in it but I don't know what it is.
- After taking a shower, I had some breakfast.
It appears the original has been fixed because the spacing is now OK. I'm not sure how that happened without an "Edited" notification though.
Edit - the OP has confirmed the edit!
As as far as I'm concerned, there is nothing wrong with the sentence. Who said there was?
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.