Hello Ann Marie!
Working on a network drive or shared drive can cause erratic behavior due to latency. For example, it could cause file corruption or prevent you from saving changes.
You can place a copy of your project on a network drive or a USB drive for backup purposes, but avoid reopening the file until you've moved it back to your local hard drive.
Can you try moving the course to your local drive and then opening the project in Storyline 360?
If that doesn't work, we'll want our Support Engineers to step in. You can reach their team directly by submitting a support case.
