errors after latest update

Since the latest updates, I am getting these errors, which are preventing users from being logged in. If I disable the plugin, the errors go away.

‘Warning: Cannot modify header information – headers already sent by (output started at /home/webiste/public_html/wp-content/plugins/custom-adminbar-menus/index.php:61) in /home/srlgroup/public_html/wp-login.php on line 390’

‘Warning: in_array() expects parameter 2 to be array, null given in /home/website/public_html/wp-content/plugins/custom-adminbar-menus/index.php on line 61’

thanks for any insight you can give

https://www.ads-software.com/plugins/custom-adminbar-menus/