c.Attachment returns 404

[efkz]

Need to serve files as downloads. Folder with files in /var/blablabla
When I do return c.Attachment("/var/blablabla/file.ext", "file.ext") I got 404 error.
But file exists. I can read it and return in JSON.
What's wrong?

[aldas]

You probably need to upgrade to v4.7.1. This relates to problem that was introduced in v4.7.0 fixed with: #2123