error (deprecated qa-base.php(720) : eval()'d code on line 49)

[krimoudz14]

hello, first i would like to thank amiyasahu for the building this awesome theme.
I have small issue if anyone could help me to know where it comes from and how to solve it:
Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated in /var/home/onlyhere/public_html/en/qa-include/qa-base.php(720) : eval()'d code on line 49
thank you

[arcanisgk]

same issue