Vbulletin 3.8.7 böyle bir hata alıyoruz neden kaynaklanıyordur?

Warning: log10() expects parameter 1 to be double, string given in [path]/includes/class_postbit.php(294) : eval()'d code on line 47

Warning: log10() expects parameter 1 to be double, string given in [path]/includes/class_postbit.php(294) : eval()'d code on line 47

Warning: log10() expects parameter 1 to be double, string given in [path]/includes/class_postbit.php(294) : eval()'d code on line 47