various notices

Debugging something else I discovered these notices:

NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:618 - Undefined index: ytchag_player_title
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:619 - Undefined index: ytchag_player_publishedAt
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:620 - Undefined index: ytchag_player_description
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:621 - Undefined index: ytchag_player_title_tag
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:622 - Undefined index: ytchag_player_description_words_number
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:626 - Undefined index: ytchag_search_input_text
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:627 - Undefined index: ytchag_search_select_options
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:628 - Undefined index: ytchag_search_select_default
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:630 - Undefined index: ytchag_search_select_show
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:644 - Undefined index: ytchag_prev_text
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:645 - Undefined index: ytchag_next_text
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:648 - Undefined index: ytchag_thumb_order_publishedAt
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:653 - Undefined index: ytchag_publishedAt
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:655 - Undefined index: ytchag_duration
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:81 - Undefined variable: ytchag_player_title
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup, YoutubeChannelGallery_Widget->changePlayerContent
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:81 - Undefined variable: ytchag_player_publishedAt
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup, YoutubeChannelGallery_Widget->changePlayerContent
NOTICE: wp-content/plugins/youtube-channel-gallery/youtube-channel-gallery.php:81 - Undefined variable: ytchag_player_description
require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ipress-child/page.php'), get_footer, locate_template, load_template, require_once('/themes/ht-ipress/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, YoutubeChannelGallery_Widget->widget, YoutubeChannelGallery_Widget->ytchag_json_markup, YoutubeChannelGallery_Widget->changePlayerContent

Can someone take care of them, please?
Thank you

https://www.ads-software.com/plugins/youtube-channel-gallery/