react-hook-form onSubmit not triggered

import React, { useState } from "react";
import FileBase64 from "react-file-base64";
import { useDispatch } from "react-redux";
import { makeStyles } from "@material-ui/core/styles";
import { TextField, Select, Input, MenuItem, Button } from "@material-ui/core";
import { useForm, Controller } from "react-hook-form";
import { yupResolver } from "@hookform/resolvers/yup";
import * as yup from "yup";
import { updatePost } from "../actions/post";

const useStyles = makeStyles((theme) => ({
  textField: {
    marginBottom: theme.spacing(2),
  },
  buttons: {
    marginTop: theme.spacing(2),
  },
}));

const tags = ["fun", "programming", "health", "science"];

const postSchema = yup.object().shape({
  title: yup.string().required(),
  subtitle: yup.string().required(),
  content: yup.string().min(20).required(),
  tag: yup.mixed().oneOf(tags),
});

const EditPostForm = ({ history, post, closeEditMode }) => {
  const dispatch = useDispatch();

  const [file, setFile] = useState(post?.image);
  const { register, handleSubmit, control, errors, reset } = useForm({
    resolver: yupResolver(postSchema),
  });

  const onSubmit = (data) => {
    const updatedPost = {
      _id: post._id,
      ...data,
      image: file,
    };
    dispatch(updatePost(post._id, updatedPost));

    reset();
    setFile(null);
    closeEditMode();
  };

  const classes = useStyles();
  return (
    <div>
      <form noValidate autoComplete="off" onSubmit={handleSubmit(onSubmit)}>
        <TextField
          id="title"
          label="Başlık"
          name="title"
          variant="outlined"
          className={classes.textField}
          size="small"
          {...register('title')}
          error={errors?.title ? true : false}
          fullWidth
          defaultValue={post?.title}
        />
        <TextField
          id="subtitle"
          label="Alt Başlık"
          name="subtitle"
          variant="outlined"
          className={classes.textField}
          size="small"
          {...register('subtitle')}
          error={errors?.subtitle ? true : false}
          fullWidth
          defaultValue={post?.subtitle}
        />
          <Controller 
            render={({field}) => (
                <Select
                    {...field}
                    input={<Input />}
                    className={classes.textField}
                    fullWidth
                >
                    {
                        tags.map((tag, index) => (
                            <MenuItem {...field} key={index} value={tag}>
                                {tag}
                            </MenuItem>
                        ))
                    }
                </Select>
            )}
            name='tag'
            control={control}
            error={errors?.tag ? true : false}
            defaultValue={tags[0]}
        />
        <TextField
          id="content"
          label="İçerik"
          name="content"
          multiline
          size="small"
          {...register('content')}
          rows={16}
          className={classes.textField}
          variant="outlined"
          error={errors?.content ? true : false}
          fullWidth
          defaultValue={post?.content}
        />
        <FileBase64 multiple={false} onDone={({ base64 }) => setFile(base64)} />
        <div className={classes.buttons}>
          <Button color="primary" variant="outlined" onClick={closeEditMode}>
            Vazgeç
          </Button>{" "}
          <Button color="secondary" variant="outlined" type="submit" >
            Kaydet
          </Button>
        </div>
      </form>
    </div>
  );
};

export default EditPostForm;

I have EditPostForm component, component doesn't give any error but when I tried to submit my form onSubmit function is not triggered.

I used react-hook-form to create my form and I used material UI components inside form. When I Click button which has type submit does not trigger onSubmit function which is called inside of handleSubmit. Why onSubmit is not triggered?