Can't Open KNWF File

I have students that aren’t able to answer the KNWF file that I share. I am on a macbook, and I believe they are on Windows. This has happened with two separate students. The workflow I believe they are using is:

• Download from the LMS (i.e. Blackboard)

• Open KNIME and select the workspace

• From their downloads, import the workflow from the local view

• Double click the workflow from their list.

For the latest student, I saw the file in their workspace list, and after clicking it, nothing happened.

I saw a few “similar” posts but they all appeared to be related to either Community flows are attempts to open from outside KNIME itself.

Any guidance or flows that are known to cause this behavior? I see other students following along in class, and the OS varies, so I am curious as to what could be isolated to the two students local environments. I admit I wish I had more information for this topic, but I do not have access to these machines as we are on Spring Break.