“Too few arguments” in error.log

Hi,
I got the following warning in my error.log of iThemes Security:
“PHP Warning: printf(): Too few arguments in /home/dierenduintje/public_html/wp-content/plugins/better-wp-security/core/modules/malware/settings-page.php on line 52”
My sit is on dierenduintje.nl
Could you please tell me what I can do about it?
Thanks!
Kees Koopman