Error_log can't understand what to do

[amorxoigel]

Hi guys!
when i look at my error_log i can see it happens several times those ones:

PHP Warning:  htmlspecialchars() expects parameter 1 to be string, array given in /home/xxx/public_html/var/cache/prod/smarty/compile/layouts_layout_left_column_tpl/43/00/e9/4300e957642d8147f216831cee827a8cc37e8c0f_2.file.products.tpl.php on line 166

I already tried to clean cache and my smarty cache on performace of BO is setted to "no".
I Really can't understand what i've to change in order to resolve this warning.

Does anyone of u had already this problem?
Any help could be really helpfull!

Prestashop 1.7.5.0

Thanks you