VueJs + Rails. file upload. Where is the mistake?

Question

Ruby on Rails

I send a file to the API via Axios and formData
Somewhere at the Rails level (before routing) such a beard comes out.

The Internet is silent on this topic.
Save me gentlemen.
Update: This situation occurs in the case of a .jpg file. In the case of .png we have:

Rack::QueryParser::InvalidParameterError (invalid byte sequence in UTF-8):

Text files work just fine.

Answer 1

content-type: multipart/form-data; charset=utf-8 try using this header.