The SAO/NASA ADS fetch engine inside the “web search” seems to be not working, because the good old ADS system has been deprecated some days ago. The new ADS is at https://ui.adsabs.harvard.edu.
I can fetch items through the BibTeX–> New entry --> ID-based generator and entering DOI, but ADS fetch engine always used to fetch the abstract as well, which has been so very beneficial.
So I kindly ask you contributors to look into this and hopefully fix this function. Thank you always.