If you are a member of multiple workspaces, you can either switch between them by:
1. Clicking your name at the lower left of the screen.
2. Selecting 'User settings' from the menu.
3. Clicking the 'Workspace' tab. All workspaces you belong to will be listed here. Selecting one of them will give you access to it.
In case when accessing any of your workspaces you see a 'page not found' message, click 'Go to my profile page'.
This directs you back to the assignments tab. Click the 'Workspace' tab and select the one you want to work on.