Adobe Audition .sesx file error

Hi !

I have a problem with the file I'm working on, the .sesx file does not open anymore. 😕😕

I work on an external hard drive and for a few days I have the following problem: "Error: Media Foundation reported an error when opening the file. The byte stream type of the given URL is unsupported."

The problem is the same using another computer,  I don't know what to do to avoid losing my job, can you please help me?

Thanks

G