Plugin activation error

I’ve attempted to reinstall my plugins during a fresh install of Arcane, but still encounter the following error (WP Debug enabled):
Fatal error: Uncaught Error: Call to a member function dirlist() on null in /var/www/html/realGuild/wp-content/plugins/arcane_custom_post_types/extensions/wbc_importer/extension_wbc_importer.php:107 Stack trace: #0 /var/www/html/realGuild/wp-content/plugins/arcane_custom_post_types/extensions/wbc_importer/extension_wbc_importer.php(149): ReduxFramework_extension_wbc_importer->demoFiles() #1 /var/www/html/realGuild/wp-content/plugins/arcane_custom_post_types/extensions/wbc_importer/extension_wbc_importer.php(71): ReduxFramework_extension_wbc_importer->getImports() #2 /var/www/html/realGuild/wp-content/themes/arcane/options-config.php(187): ReduxFramework_extension_wbc_importer->__construct(Object(ReduxFramework)) #3 /var/www/html/realGuild/wp-includes/class-wp-hook.php(287): redux_register_custom_extension_loader(Object(ReduxFramework)) #4 /var/www/html/realGuild/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array) #5 /var/www/html/realGuild/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #6 /var/ww in /var/www/html/realGuild/wp-content/plugins/arcane_custom_post_types/extensions/wbc_importer/extension_wbc_importer.php on line 107