Error log shows stack trace for google-authenticator.php errors

  • I see probably hundreds of these in my error log. I wonder if anyone knows what is happening. “johnny” is one of my users. Thank you!

    2021/04/25 12:02:50 [error] 62#62: *1660 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught Error: Call to undefined function login_header() in /home/user/public_html/wp-content/plugins/google-authenticator/google-authenticator.php:638

Stack trace:

#0 /home/user/public_html/wp-content/plugins/google-authenticator/google-authenticator.php(625): GoogleAuthenticator->secondary_login_screen()

#1 /home/user/public_html/wp-includes/class-wp-hook.php(287): GoogleAuthenticator->check_otp(Object(WP_User), 'johnny', 'test')

#2 /home/user/public_html/wp-includes/plugin.php(212): WP_Hook->apply_filters(Object(WP_Error), Array)

#3 /home/user/public_html/wp-includes/pluggable.php(549): apply_filters('authenticate', NULL, 'johnny', 'test')

#4 /home/user/public_html/wp-includes/class-wp-xmlrpc-server.php(275): wp_authenticate('johnny', 'test')

#5 /home/user/public_html/wp-includes/class-wp-xmlrpc-server.php(4766): wp_xmlrpc_server->login('johnny', 'test')

#6 /home/user/public_html/wp-includes/class-wp-xmlrpc-serv" while reading response header from upstream, client: 185.220.101.22, server: _, request: "POST /xmlrpc.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "my-site.com"
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