Error 500 after latest update

Hi dear,

After the latest update when trying to log in an Error 500 Internal server error occurs. After disabling this plugin login works as normal. Checked the error log and it says the following:

PHP Notice: Undefined index: show_all_login_records in /home/users/XXXXXXX/XXXXXX/web/wp-content/plugins/when-last-login/when-last-login.php on line 256
[15-May-2018 17:58:45 UTC] PHP Warning: include(/home/users/XXXXXXXX/XXXXXXXX/web/wp-content/plugins/when-last-login//includes/lib/ipAnonymizer.php): failed to open stream: No such file or directory in /home/users/XXXXXX/XXXXXXXX/web/wp-content/plugins/when-last-login/when-last-login.php on line 31
[15-May-2018 17:58:45 UTC] PHP Warning: include(): Failed opening ‘/home/users/XXXXXXX/XXXXXXXXXXX/web/wp-content/plugins/when-last-login//includes/lib/ipAnonymizer.php’ for inclusion (include_path=’.:/opt/remi/php56/root/usr/share/pear:/opt/remi/php56/root/usr/share/php:/usr/share/pear:/usr/share/php’) in /home/users/XXXXXX/XXXXXXXX/web/wp-content/plugins/when-last-login/when-last-login.php on line 31
==================================================
“Folder name and url replaced with an X”

Any idea what’s going on?

Thanks,
Pavol