The value of the for attribute of the label element must be the ID of a non-hidd

Good morning,
following the html validation attempt, the following error is returned:
“The value of the attribute of the label element must be the ID of a non-hidden form control”.
It seems that at the search form ( <div class=”wpr_search search_top”> )there is a <label> tag that does not contain an “id” value corresponding to the “for” attribute.
Would it be possible to fix the code?

Thank you all