Revit Design Software cannot open old files

Hi,
I have the Revit software that I use to assist me in my architecture and modeling career. I love this software for its use of use because I understand its capabilities well. However recently, when I try to open an existing design is displays an error as shown below. Please assist in solving this error because I even did a reinstallation and didn’t work.

Revit
…Revit{4C326AC0456B-4E79-9572-2F6E2E0C… was not found
