QUESTION Updating GetSimple to the Community Edition

[Hypertexter]

This is what debug produced:

[19-Jan-2023 10:18:44 Europe/Amsterdam] PHP Fatal error:  Uncaught Error: Undefined constant "HTTP_HOST" in /home/user/public_html/plugins/nokes_sharebar.php:198
Stack trace:
#0 /home/user/public_html/admin/inc/plugin_functions.php(293): sharebar_content()
#1 /home/user/public_html/admin/inc/theme_functions.php(31): exec_action()
#2 /home/user/public_html/theme/Innovation/template.php(47): get_page_content()
#3 /home/user/public_html/index.php(134): include('/home/user/...')
#4 {main}
  thrown in /home/user/public_html/plugins/nokes_sharebar.php on line 198
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Deprecated:  Function strftime() is deprecated in /home/user/public_html/plugins/news_manager/inc/functions.php on line 152
[19-Jan-2023 10:19:16 Europe/Amsterdam] PHP Fatal error:  Uncaught Error: Undefined constant "HTTP_HOST" in /home/user/public_html/plugins/nokes_sharebar.php:198
Stack trace:
#0 /home/user/public_html/admin/inc/plugin_functions.php(293): sharebar_content()
#1 /home/user/public_html/admin/inc/theme_functions.php(31): exec_action()
#2 /home/user/public_html/theme/Innovation/template.php(47): get_page_content()
#3 /home/user/public_html/index.php(134): include('/home/user/...')
#4 {main}
  thrown in /home/user/public_html/plugins/nokes_sharebar.php on line 198

Newsmanager plugin is on 3.6.1 and Addons plugin is on 0.9.5.1, both from PHP8-plugin-site.