I spent several minutes to prepare sew screenshots and describe my problem - and finally I got this error:
Oops! Your question couldn't be submitted because:
We're sorry, but as a spam prevention mechanism, new users aren't allowed to post images. Earn more than 10 reputation to post images. sorry, the 'ubuntu' tag is not allowed. users with less than 300 reputation can't create new tags. The tag 'ubuntu' is new. Try using an existing tag
Could you show this message on the beginning to prevent wasting time.