Please let me know the URL you are using to join the students.
Adobe Spark for Education is now Adobe Express for Education and is free for K-12 and Higher Education customers with Federated IDs or Enterprise IDs.
Existing Adobe Spark for Education plans are upgraded to Adobe Express for Education, which includes Adobe Express, Premiere Rush, and Photoshop Express. These plans continue to be free for K-12 and Higher Education customers. Learn more.
My district has been using Adobe Express (formerly Spark) for many years, but we consistently have issues for both teachers and students when they try to log in with their district email (Google for Edu). This student tried using a class code to sign in:
We're having a similar issue. Students get stuck in an endless loop where they are kicked out after confirming the class. I tried calling support and we even had a remote session with no success.