Router no longer sends props to component

Question

I'm creating my newest component as a Hook component, where I imported 'useNavigate' since the regular way of pushing history etc won't work:

import { useNavigate } from 'react-router-dom';

This forced me to update react-dom and react-router-dom into the latest versions. Which in turn forced me to change Switch to Routes:

<Routes >
  <Route exact path="/" element={<Home />} />
  <Route exact path="/home" element={<Home />} />
  <Route exact path="/login" element={<Login />} />
  <Route exact path="/register" element={<Register/>} />
  <Route exact path="/profile" element={<Profile />} />
  <Route path="/schedule/" element={<BoardSchedule />} />
  <Route path="/user" component={<BoardUser />} />
  <Route path="/mod" element={<BoardModerator />} />
  <Route path="/admin" element={<BoardAdmin />} />
</Routes>

Now when logging in, I'm getting this error:

login.component.js:60 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'push')

login.component still looks the same:

handleLogin(e) {
    e.preventDefault();

    this.setState({
      message: "",
      loading: true
    });

    this.form.validateAll();

    if (this.checkBtn.context._errors.length === 0) {
      AuthService.login(this.state.username, this.state.password).then(
        () => {
          this.props.history.push("/user");
          window.location.reload();
        },
        error => {
          const resMessage =
            (error.response &&
              error.response.data &&
              error.response.data.message) ||
            error.message ||
            error.toString();

          this.setState({
            loading: false,
            message: resMessage
          });
        }
      );
    } else {
      this.setState({
        loading: false
      });
    }
  }

It seems that this.props is always undefined within login.component now, which I'm pretty sure wasn't the case when I was using Switch instead of Routes - because everything worked fine back then.

I've tried multiple suggestions on here and elsewhere for over an hour all in vain. What am I missing?