• I installed the plugin and activated it.
    Wordpress gives a critical error and the site’s most functions stopped working properly.

    ================
    WordPress version 5.8.1
    Current theme: Lectern (version 1.1.7)
    Current plugin: RSVPMaker for Toastmasters (version 4.9.1)
    PHP version 7.3.30
    ================
    Error received

    An error of type E_ERROR was caused in line 9550 of the file /home/madhawal/public_html/silverline/wp-content/plugins/rsvpmaker-for-toastmasters/rsvpmaker-for-toastmasters.php. Error message: Uncaught Error: Call to undefined function rsvpmail_is_problem() in /home/madhawal/public_html/silverline/wp-content/plugins/rsvpmaker-for-toastmasters/rsvpmaker-for-toastmasters.php:9550
    Stack trace:
    #0 /home/madhawal/public_html/silverline/wp-includes/class-wp-hook.php(303): rsvptoast_admin_notice(”)
    #1 /home/madhawal/public_html/silverline/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)
    #2 /home/madhawal/public_html/silverline/wp-includes/plugin.php(470): WP_Hook->do_action(Array)
    #3 /home/madhawal/public_html/silverline/wp-admin/admin-header.php(287): do_action(‘admin_notices’)
    #4 /home/madhawal/public_html/silverline/wp-admin/plugins.php(603): require_once(‘/home/madhawal/…’)
    #5 {main}
    thrown`

    Tried on 2 different hosts with 2 different php versions.
    The same error occurred.

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