Hi, I see that there is another post over 3+ years old but I faced the same problem today 18-Sep-2020. (https://community.adobe.com/t5/lightroom-classic/projects-in-adobe-spark-page-getting-disappeared/m-...
My latest project, which was school assignment, is gone. It just disappeared. At first on my regular computer I was getting account temporarily disabled message. I tried logging in from another computer in private browsing mode and I was able to login to spark.abode.com but it only showed me two of my old projects. The latest one is gone. I had that project URL bookmarked and when I try clicking the bookmark it shows me the loading wait splash page but it just keeps spinning and never loads. Please help!
Please contact Spark Support on Zendesk.
You can open a ticket with support staff by clicking the below link:
Just did, thank you @Nancy_OShea!