I have problems with publishing link on twitter.
First my problem related to twitter validator. Early, then I post my link (https://stage-journals.lww.com/aenjournal/Abstract/2016/07000/Treating_Adult_Asthma_Exacerbations_With_a_2_Day.2.aspx) on validator, it correct displayed preview link, but at the moment it displaying this: ERROR: Failed to fetch page due to: HttpConnectionTimeout. I hope that after a while the problem will disappear (judging by the questions that have already been asked on this forum).
Second my problems related to displaying preview link on twitter. I can not understand how the link preview can be correctly displayed by the validator, but not displayed by the twitter itself. Can someone explain the problem to me?
Thanks in advance for the answer.