Missing folders in Catalog

[Ernestoimages]

Opened my catalog today and all of my folders are lost. How do I Update the location for all of my folders? Anyone else experiencing this? Everything was there yesterday and today its all gone.

[Ruurd van Dijk]

Sure you (or Lightroom) opened the right Catalog? Most probable cause is that Lightroom couldn't find you default (last opened) catalog and therefore created a new, empty one.

[Ernestoimages]

Yes, I opened the correct catalog. I even tried to restore the catalog with the latest backup. Even after the restore, this is still happening. 

[Rob_Cullen]

Make yourself knowledgeable about "Missing Photos" in the Lr-Classic Catalog-

MISSING FILES & FOLDERS (Lightroom Queen)

MISSING FILES AND FOLDERS-(Computer Darkroom)

And the methods to 'fix' are in the articles linked.

[Ernestoimages]

It appears that after the update for some not all of my folders links have been broken. What is the best way to "Find Missing Folder..." in Lightroom? I have hundreds of folders that are missing. Is there a way to do it all at once vs individually?

[ManiacJoe]

By "finding" a top-most folder, all the sub-folders will be auto-fixed.

If LR is not showing the folder hierarchy, right-click "show parent folder" in the folders panel (repeat as needed).

[dj_paige]

Opened my catalog today and all of my folders are lost. How do I Update the location for all of my folders? Anyone else experiencing this? Everything was there yesterday and today its all gone.

By @Ernestoimages

if you mean there is a question mark icon on the folder, see: https://www.computer-darkroom.com/lr2_find_folder/find-folder.htm

Otherwise: "lost" meaning what specifically? Please explain in detail.