Website Application - User Request Error

Error in:
https://sasomanipur.org/photoList.aspx?albumID=3ab857fc-eb20-42e1-91a3-2686752317d8

Error Message:
Object reference not set to an instance of an object.

Stacktrace Error Message:
at photoList.getPhotos() at photoList.Page_Load(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Return Process
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