Hi aalfouzan,
It looks like we helped you with some custom Ninja Simple Icon Menu styling in the past, and that CSS remains in your template.css file.
In order to make the module work again, look for the following CSS declarations at the bottom of your template.css file, and comment them out by adding /* and */ tags around them as I have done here:
/*
.nsi-iconvert ul {
padding-left: 45px;
right: 0;
}
*/
/*
div.nsi-container div ul li {
-moz-background-clip: border;
-moz-background-origin: padding;
-moz-background-size: auto auto;
background-attachment: scroll;
background-color: transparent;
background-image: none;
background-position: 0 0;
background-repeat: repeat;
}
*/
/*
.nsi-container ul {
position: relative;
right: -15px;
}
*/
/*
.nsi-container div {
float: none;
left: 50%;
margin-left: -250px;
margin-right: auto;
position: relative;
text-align: center;
width: 500px;
}
*/