Widget not working

I tried to activate the widget for the brands in the sidebar, but it is not showing up.
In the widget area, it is also with a small vertical yellow bar.

>
Array
(
[home_url] => https://www.happy-orange.nl
[site_url] => https://www.happy-orange.nl
[version] => 3.3.3
[wp_version] => 4.9.4
[wp_multisite] =>
[wp_memory_limit] => 40M
[wp_debug_mode] =>
[wp_cron] => 1
[language] => nl_NL
[server_info] => Apache/2
[php_version] => 7.1.12
[php_post_max_size] => 8M
[php_max_execution_time] => 0
[php_max_input_vars] => 1000
[max_upload_size] => 2097152
[default_timezone] => UTC
[theme] => Array
(
[name] => FocusBlog
[version] => 1.300.10
[parent_theme] =>
)

[active_plugins] => Array
(
[0] => iwp-client/init.php
[1] => autoptimize/autoptimize.php
[2] => broken-link-checker/broken-link-checker.php
[3] => facebook-for-woocommerce/facebook-for-woocommerce.php
[4] => google-analytics-for-wordpress/googleanalytics.php
[5] => mollie-payments-for-woocommerce/mollie-payments-for-woocommerce.php
[6] => perfect-woocommerce-brands/main.php
[7] => really-simple-ssl/rlrsssl-really-simple-ssl.php
[8] => thirstyaffiliates/thirstyaffiliates.php
[9] => thrive-leads/thrive-leads.php
[10] => thrive-visual-editor/thrive-visual-editor.php
[11] => when-last-login/when-last-login.php
[12] => woocommerce-colors/woocommerce-colors.php
[13] => woocommerce/woocommerce.php
[14] => wordpress-seo/wp-seo.php
[15] => wp-all-export/wp-all-export.php
[16] => wp-server-stats/wp-server-stats.php
[17] => wp-time-capsule/wp-time-capsule.php
[18] => wpseo-woocommerce/wpseo-woocommerce.php
)

[pwb_options] => Array
(
[version] => 1.6.2
[wc_pwb_admin_tab_brand_single_position] => after_meta
[old_wc_pwb_admin_tab_slug] => merken
[wc_pwb_notice_plugin_review] =>
[wc_pwb_admin_tab_slug] => merken
[wc_pwb_admin_tab_brand_desc] => yes
[wc_pwb_admin_tab_brand_single_product_tab] => yes
[wc_pwb_admin_tab_brands_in_loop] => no
[wc_pwb_admin_tab_brands_in_single] => brand_image
[wc_pwb_admin_tab_brand_logo_size] => thumbnail
)

)

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