I need help, to send files in the API

I have the application almost ready, but I found a limitation in the API, I’ve tried in several ways to send jpg, png files and I can’t at all, I’m outraged because at https://web.postman.co/
I can upload the file normally, where am I going wrong?
help me i need a solution

I’m having the same problem mate, did you find any workaround?

Same problem here. Anyone can help?