plugin update errot

During a plugin update the message below is showing up.

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/domains/website.com/public_html/wp-includes/plugin.php on line 525

The plugin is updated and works fine, the only thing is that the message is shown every time i update a plugin.

What could be the problem?

JB