Doxygen: parameters of member my_function are not (all) documented

I have this C file:

/**
 * Blah blah blah.
 *
 * @file   myfile.c
 * @author Carlos Alexandro Becker (author@mail.com)
 *
 * @brief  Some Brief.
 */
#include <jni.h>
#include <stdio.h>
#include "myfile.h"

/**
 * Blah blah blah.
 * @param obj The obj
 * @return True
 */
static bool
something_has_blah (jobject * obj)
{
  return true;
}

void
my_fn (JNIEnv * env, jobject * obj, int number)
{
   // code
}

And the .h file:

/**
 * Blah blah blah.
 *
 * @file   myfile.h
 * @author Carlos Alexandro Becker (author@mail.com)
 *
 * @brief  Some Brief.
 */
#ifndef FUNCTIONS_H_BIND_INCLUDED
#define FUNCTIONS_H_BIND_INCLUDED

/**
 * Blah blah blah
 * @param env Java Environment
 * @param obj Obj
 * @param number Number
 */
void my_fn (JNIEnv * env, jobject * obj, int number);

#endif

For some reason, Doxygen is complaining about this function:

error: parameters of member my_fn are not (all) documented (warning treated as error, aborting now)

The Doxyfile looks like:

WARN_AS_ERROR         = YES
WARN_IF_UNDOCUMENTED  = YES
WARN_IF_DOC_ERROR     = YES
WARN_NO_PARAMDOC      = YES
JAVADOC_AUTOBRIEF     = YES
OPTIMIZE_OUTPUT_FOR_C = YES
GENERATE_HTML         = NO
GENERATE_LATEX        = NO

What am I missing in the documentation of that method to make Doxygen happy? I tried to add a @return void and other stuff but nothing worked out.

By the way, here is the full reproducible code: https://github.com/caarlos0/happy-doxygen