Some URLs don't save when adding by identifier
I have had this experience for a while but here's a current link that Zotero doesn't capture when I try to add by pasting the URL in the identifier: https://qz.com/africa/2145285/nigerian-startups-with-abusive-cultures-have-been-put-on-notice
Upgrade Storage
Adding by URL in the Zotero web library or ZoteroBib is always going to be less reliable, since some sites will block Zotero's cloud-based requests. That's the case here. @Fantenyimapa, you'll want to use the Zotero Connector and the desktop app if possible.