Where my folders go? Ureal Engine 5.1.1

[ObjectSlayer (Omegapy)]

I created a world using meshes, neatly organize my actors in folders, saved my project, and closed the editor.
The next day, all my folders with my actors’ names neatly organized folders are gone…
My actors are not gone from my map… just my neatly organized folders
Search all my subfolders, nothing, in the Unreal editor and in file explorer.
Also, when clicking on an actor, It used to also show it in the content browser, but not anymore.
Please see pic.
I am new at ‘Unreal Engine’ Wondering what am doing wrong or not understanding?
Thanks

[SupportiveEntity]

Hey there @ObjectSlayer! Welcome to the community! It looks like you may have accidentally lost the outliner. All I can see is the details panel in your screenshot. To get your outliner back, just go to Window->Outliner-> Outliner 1

Let me know if that helps!

[ObjectSlayer (Omegapy)]

Thank you very much, it did indeed help, yeah