Different versions in a project,

Today, I noticed that in Easel I could no longer see the different versions of workpieces I made within a project. The bar on the bottom side of the screen is gone at least here in Firefox.

Edit:
Chrome and Edge are oke, Firefox private browsing is also fine.

Oke figured it out, click on the lower bar in the screen, and it the different workpieces in the project are shown again.