File corrupted by "Brightness"

My project is giving the error:

"Failed to open project. Check it is a valid construct 3 single-file(.c3p) project".

And in the console the error is :

"[Project] Exception opening: Error: effect type name 'Brightness' already in namespace"

is there some way to fix it?

You can probably unpack the project into a folder and manually edit the files, removing the second mention of the Brightness effect.