An embed code that points to a dead domain does no harm to your page, but it leaves a gap where readers expect coverage. Search your CMS for scribblelive.com to find the articles that still carry one.
The old updates themselves are not coming back through the embed. If an archived live blog matters, the text has to come from wherever your team kept a copy.
Most former ScribbleLive customers moved in 2023. If you are only now picking a replacement, you have several real options, and they suit different sizes of newsroom.
Large newsrooms with a big archive should look at Tickaroo, whose documentation includes a ScribbleLive importer, or at the migration partner Rock Content recommended when it announced the shutdown. Livetickr has no importer. It is the lean option for the next live event: one script tag, a focused editor and no cookies in the embed.