My work areas have disappeared

I did absolutely nothing on my computer and my 4 work areas became 1 only. My distribution is Ubuntu Budgie 19.04. How do I solve this?

By default dynamic workspaces are switched on … I.e. on demand
Ctrl + alt + right arrow to create a workspace. If nothing is on that workspace it is automatically deleted.

To use static rather then dynamic this thread and answer will help

I’ve done with your answer, thanks!