Getting this error randomly on server here is the iis details.
IIS version= 10.0.14393.0
Windows server 2016
System.Web.Management.WebRequestErrorEvent, System.InvalidOperationException, An unhandled exception has occurred.The resource class for this page was not found. Please check if the resource file exists and try again.
Stack trace: at System.Web.Compilation.LocalResXResourceProvider.CreateResourceManager()
at System.Web.Compilation.BaseResXResourceProvider.EnsureResourceManager()
at System.Web.Compilation.BaseResXResourceProvider.GetObject(String resourceKey, CultureInfo culture)
at System.Web.Compilation.ResourceExpressionBuilder.GetResourceObject(IResourceProvider resourceProvider, String resourceKey, CultureInfo culture, Type objType, String propName)
at ASP.usercontrols_uc_adduser_ascx.__BuildControlImage1()
at ASP.usercontrols_uc_adduser_ascx.__BuildControlcontractorUC_RadAjaxLoadingPanel1()
at ASP.usercontrols_uc_adduser_ascx.__BuildControlTree(secure_usercontrols_uc_adduser_ascx __ctrl)
at ASP.testpage_aspx.__BuildControlAddQuickContractor1()
at ASP.testpage_aspx.__BuildControlfrmMain()
at ASP.testpage_aspx.__BuildControlTree(secure_bidmain_aspx __ctrl)
at ASP.testpage_aspx.FrameworkInitialize()
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
This error is coming randomly, but after recycling the app pool fixes it. Can some help with this.