Sheets and Workspaces disappered

this morning I logged into SS as I do daily and all my workspaces, sheets etc were gone. I can no longer see them. People I have shared those workspaces with are still able to access them and see them but I can't. I've been a regular user/creator on SS for many years now without a problem. I've called SS help and they don't seem to understand the problem and have asked if I checked the "deleted file". Very frustrating! Just wondering if anyone experienced this situation and if you did what resolved it? Thank you for any information you can provide.

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