2023-03-22 09:18:57,028 [YDAWBH120][Thread:36][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.NullReferenceException: Object reference not set to an instance of an object.
   at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
   at DotNetNuke.Framework.DefaultPage.InitializePage()
   at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
   at System.Web.UI.Control.InitRecursive(Control namingContainer)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2023-03-22 09:18:57,070 [YDAWBH120][Thread:36][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?error=An unexpected error has occurred&content=0
System.NullReferenceException: Object reference not set to an instance of an object.
   at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
   at DotNetNuke.Framework.DefaultPage.InitializePage()
   at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
   at System.Web.UI.Control.InitRecursive(Control namingContainer)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2023-03-22 11:09:02,847 [YDAWBH120][Thread:35][ERROR] DotNetNuke.UI.WebControls.CaptchaControl - System.ArgumentException: Font 'MS Sans Serif' cannot be found.
   at System.Drawing.FontFamily.CreateFontFamily(String name, FontCollection fontCollection)
   at System.Drawing.FontFamily..ctor(String name)
   at DotNetNuke.UI.WebControls.CaptchaControl.GetFont()
2023-03-22 14:31:17,776 [YDAWBH120][Thread:10][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.Web.HttpException (0x80004005): A potentially dangerous Request.Path value was detected from the client (:).
   at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)
2023-03-22 14:33:11,527 [YDAWBH120][Thread:13][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.Web.HttpException (0x80004005): A potentially dangerous Request.Path value was detected from the client (:).
   at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)