Cannot redeclare bu_navigation_supported_post_types()

[Esbern]

Hi on wp 5.8.2 php 8.1 When activating the plugin i get
Fatal error: Cannot redeclare bu_navigation_supported_post_types() (previously declared in /customers/6/9/3/geoinformatics.online/httpd.www/wp-content/plugins/bu-learning-blocks/bu-learning-blocks.php:117) in /customers/6/9/3/geoinformatics.online/httpd.www/wp-content/plugins/bu-navigation/includes/library.php on line 32