Texture is not loading using WWW class in WebGL build.

The project runs properly on editor, but not when uploaded to the server. In my project, i am fetching some detail from a table on my server and a profile pic using a link, I am getting all the data from table successfully, but profile picture is unable to load. here is the code i written.

 string profileLink;
 IEnumerator LoadWebData(WWW www)
 {
     yield return www;
     if (string.IsNullOrEmpty(www.error) && !www.text.Contains("record not found"))
     {
         usr = JsonReader.Deserialize<UserData>(www.text);
         name_p1.text = usr.display_name;
         name_p2.text = usr.display_name;
         point_p1.text = usr.points;
         point_p2.text = usr.points;
         karma_p1.text = usr.level;
         karma_p2.text = usr.level;
     }
     if (usr.profile_pic != "")
     {
         profileLink = "www.twitchtime.com/doforward/wp-content/uploads/2017/" + usr.profile_pic;
         
         WWW www2 = new WWW(profileLink);
         StartCoroutine(LoadProfilePic(www2));
         
     }
 }
 IEnumerator LoadProfilePic(WWW www2)
 {
     yield return www2;
    
     if (string.IsNullOrEmpty(www2.error))
     {
         profilePic.mainTexture = www2.texture;
         profilePic2.mainTexture = www2.texture;
         debugStr.text = profileLink;
     }
     debugStr.text = www2.error;
 }

It shows unknown error in debugStr label.