Open the developer console on your browser and check for any JavaScript errors.
Uncaught ReferenceError: QTags is not defined
at admin.php?page=HT_blocked_list:2575:460
/wp-admin/admin-ajax.php?action=put_bible_reading_plan&?action=wp-compression-test&test=1&_ajax_nonce=f49b4ec7f6&1658081630590:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/wp-admin/admin-ajax.php?action=put_bible_reading_plan&?action=HT_retrieve_page_limit&_fs_blog_admin=true:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/wp-admin/admin-ajax.php?action=put_bible_reading_plan&?action=HT_retrieve_blocked_list&_fs_blog_admin=true:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/wp-admin/admin-ajax.php?action=put_bible_reading_plan&?action=wp-compression-test&test=2&_ajax_nonce=f49b4ec7f6&1658081630824:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/wp-admin/admin-ajax.php?action=put_bible_reading_plan&?action=wp-compression-test&test=no&_ajax_nonce=f49b4ec7f6&1658081631333:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
You have a plugin installed that is modifying the admin ajax URL incorrectly. It is adding ?action=put_bible_reading_plan& to the end of it. What plugin do you have installed that would use that when using ajax? I’m guessing maybe this one? https://wordpress.org/plugins/bible-reading-plans/
Thank you. I disabled that plug in and all worked fine. I will email the developer of that plugin.