Not being able to edit emails

Hello All,

I'm getting multiple reports from different program managers that they are not able to edit emails. When they click on the "Edit Draft" button; they are getting a [Cannot Load Email] screen (below). Anyone else experiencing this? Are there any solutions?

This happens when people are trying to edit the emails, and it seems they can edit the email if they create a new one. The only problem is, if they close it, then they get the same problem as above.

Thanks in advance!