I was working with my .blend file on a new computer and when I opened the file, for some reason the viewport couldn't show the shaded surfaces of the objects, only the outlines in object mode. I have tried all viewport shaders (wireframe, solid, material preview etc.), but it didn't render the objects.
I think I found the problem When I turned on split normals. As you can see, all split normals seem to be concentrated in one single vertex. I have no idea how this came to be but I have worked on it from another computer with version 2.82a, uploaded it to Google Drive and then downloaded and opened it on a new computer. The Blender version was the same, but it did shade correctly on that computer so I assume this error happened during upload. I have not used any custom normals on the objects.
I tried 'recalculate outside' already, but so far this doesn't recalculate my split normals. I would greatly appreciate it if someone has an idea how to fix my normals.
EDIT: The face normals are all at one place, too. I created the .blend file with 2.93.1, so it might be a version problem. I forgot to mention that.