Error: Call to a member function toUrl() on null in views_jump_menu_preprocess_views_jump_menu() (line 108 of modules/contrib/views_jump_menu/views_jump_menu.module)

added the patch for views_jump_menu.module
```
- if (!empty($options['label_field'])) {
+ if (!empty($options['label_field']) && !empty($optione['url_field'])) {
```

This was defined underneath, so update to $view->field[$options['url_field']] for the check.

Please ignore and close this issue, requiring the relation fixed it.
Checking only for the label is enough for these are defined in a combined array.