Hi there – I have used the plugin and it is working well. I have gotten errors from Google which are saying that Google is choosing a different canonical than user. This is because the site is adding a referer to the URLs. (https://axiscoachusa.com/airporttravel/manchesterairporttravel.html?imz_s=4beo2ia9om2cpsjgngima1mvs7) Do you know if this is due to the plugin? Thank you!

Hi, my site is multi-language, so I use WPML.
The home page in the other languages presento this fatal error:

Fatal error: Uncaught Error: Call to a member function using_permalinks() on null in /home/qowqdsrp/new.bredasys.com/wp-content/plugins/add-html-extension-to-pages/AHETP.php:80 Stack trace: #0 /home/qowqdsrp/new.bredasys.com/wp-includes/class-wp-hook.php(307): AHETP->no_page_slash(NULL, '') #1 /home/qowqdsrp/new.bredasys.com/wp-includes/plugin.php(191): WP_Hook->apply_filters(NULL, Array) #2 /home/qowqdsrp/new.bredasys.com/wp-content/plugins/sitepress-multilingual-cms/classes/utilities/class-wpml-slash-management.php(82): apply_filters('user_trailingsl...', '/en', '') #3 /home/qowqdsrp/new.bredasys.com/wp-content/plugins/sitepress-multilingual-cms/classes/utilities/class-wpml-slash-management.php(52): WPML_Slash_Management->user_trailingslashit('/en') #4 /home/qowqdsrp/new.bredasys.com/wp-content/plugins/sitepress-multilingual-cms/classes/url-handling/converter/strategy/class-wpml-url-converter-subdir-strategy.php(113): WPML_Slash_Management->maybe_user_trailingslashit('https://new.bre...') #5 /home/qowqdsrp/new.bredasys. in /home/qowqdsrp/new.bredasys.com/wp-content/plugins/add-html-extension-to-pages/AHETP.php on line 80

Can you help me?