[InvalidOperationException: Nullable object must have a value.]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +60
HervErmelo.kerkdienst_test.Page_Load(Object sender, EventArgs e) in E:\Websites\Hervormd Ermelo\Site 2018\Programming\HervErmelo\HervErmelo\kerkdienst_test.aspx.vb:12
System.Web.UI.Control.OnLoad(EventArgs e) +108
System.Web.UI.Control.LoadRecursive() +90
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533
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