Fatal error?

Problem/Motivation

Have any got this fatal error?

Fatal error: Declaration of
Drupal\selective_better_exposed_filters\Plugin\better_exposed_filters\filter\DefaultWidget::defaultConfiguration()
must be compatible with
Drupal\better_exposed_filters\Plugin\better_exposed_filters\filter\FilterWidgetBase::defaultConfiguration():
array in C:\xampp\htdocs\public_html\modules\custom\selective_better_exposed_filters\src\Plugin\better_exposed_filters\filter\DefaultWidget.php on line 21

As far as I know, I do have a standard setup and are using the module as intended. I am using better_exposed_filters 7.0.5

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes