Looks like the web page can't handle data returned from your server. For example, if the web page expect one field to have a value but the returned data is null value and the page is not designed to hanle null value. Depends what type of web site it is, you may need to talk with end user who experienced the problem and to narrow down where the problem is or you may need to talk with the developer to look into the code to find out as the error message did indicate where the error was generated from.
By the way, it will be much easier to simply post the text of the error message here instead of post 9 large screen captures of portions of the error message. More convenient for both parties (yourself and the reader).