Spring Boot MissingServletRequestPartException for 'file' despite correct @RequestParam in Multipart upload

Question

I'm encountering a MissingServletRequestPartException when uploading files to my Spring Boot backend from a React Native/Expo app. The error states: Resolved [org.springframework.web.multipart.support.MissingServletRequestPartException: Required part 'file' is not present.]

Backend Code (Spring Boot):

@PostMapping("/{userMobile}/uploadLogo")  
public ResponseEntity<String> uploadBusinessLogo(  
    @PathVariable String userMobile,  
    @RequestParam("file") MultipartFile file  // <-- Expects part named "file"  
) {  
    //code
    return uploadFile(file, userMobile, "logo");  
}  

Frontend Code (React Native):

const uploadImage = async (uri: string, type: "Logo" | "Signature") => {  
  const formData = new FormData();  
  formData.append("file", {  
    uri,  
    name: `${type}_${Date.now()}.jpg`,  
    type: "image/jpeg",  
  } as any);  

  const endpoint = `http://localhost:8080/api2/business/${userMobile}/upload${type}`;  
  const response = await axios.post(endpoint, formData, {  
    headers: {  
      "Content-Type": "multipart/form-data",  // Explicitly setting content-type  
    },  
  });  
  return response.data;  
};