Function sensei_get_prev_next_lessons() not found in class-sensei-frontend.php

[jsantosi]

Steps to Reproduce

1. Access the learning website
2. Navigate to the current lesson page
3. Try to move to the next lesson.
4. See error

Expected Behavior
I expected that clicking to move to the next lesson would transition without errors.

Actual Behavior
When attempting to move to the next lesson, the following error occurs:

Fatal error: Uncaught Error: Call to undefined function sensei_get_prev_next_lessons() in /home/customer/www/staging17.gabster.com.br/public_html/learn/wp-content/plugins/sensei-lms/includes/class-sensei-frontend.php:736
Additional Context
Sensei LMS Version: 4.24.0
WordPress Version: 6.5.3

[jsantosi]

I managed to locate the function in template_functions.php. However, for some reason, it's not being called in class-sensei-frontend.php.
Perhaps it's necessary to check if the function exists using "functions_exists".
This should avoid the undefined function call error. See:

`/**

• Redirect to the next lesson, if applicable.

• @SInCE 1.12.0

• @param int $lesson_id Lesson ID.
  */
  private function maybe_redirect_to_next_lesson( $lesson_id = 0 ) {
  if ( 0 >= $lesson_id ) {
  return;
  }

  // Verifica se a função existe antes de chamá-la
  if ( ! function_exists( 'sensei_get_prev_next_lessons' ) ) {
  return;
  }

  $nav_links = sensei_get_prev_next_lessons( $lesson_id );
  $redirect_url = false;

  if ( isset( $nav_links['next'] ) ) {
  $redirect_url = $nav_links['next']['url'];
  }

  /**

  • Filter the URL that students are redirected to after completing a lesson.
  • @SInCE 1.12.0
  • @hook sensei_complete_lesson_redirect_url
  • @param {string|bool} $redirect_url URL to redirect students to after completing a lesson. False to skip redirect.
  • @param {int} $lesson_id Current lesson ID.
  • @param {array} $nav_links Navigation links found for the current lesson.
  • @return {string|bool} Filtered URL to redirect students to after completing a lesson. False to skip redirect.
    */
    $redirect_url = apply_filters( 'sensei_complete_lesson_redirect_url', $redirect_url, $lesson_id, $nav_links );

  if ( $redirect_url ) {
  wp_safe_redirect( esc_url_raw( $redirect_url ) );
  exit;
  }
  }
  `

[merkushin]

Hi @jsantosi !

Tested it on a fresh website with WordPress 6.5.3, Sensei LMS 4.24.0 and Course Theme 1.3.7.
No error found.

Do you have other plugins or do you use a custom theme?
Could you try to deactivate other plugins one-by-one and check if the issue persists?
If the plugin dance didn't help, try to switch the theme to a standard WordPress theme or to the Course theme and check if the issue persists.