2020-07-12 00:02:13,121 [YDAWBH120][Thread:44][ERROR] DotNetNuke.Services.Exceptions.Exceptions - System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at DotNetNuke.UI.WebControls.CaptchaControl.GenerateImage(String encryptedText)
2020-07-12 19:14:49,945 [YDAWBH120][Thread:103][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\Inetpub\vhosts\health-science.nl\httpdocs\bb.txt'.
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendToFile(String fullPath, Stream content, Int32 retries)
   at Telerik.Web.UI.AsyncUpload.ContentAppender.AppendTo(String fullPath)
   at Telerik.Web.UI.AsyncUploadHandler.HandleChunkUploadRequest(String serializedMetaData)
   at Telerik.Web.UI.AsyncUploadHandler.ProcessRequest(HttpContext context)
   at Telerik.Web.UI.HandlerRouter.ProcessHandler(String handlerKey, HttpContext context)
   at Telerik.Web.UI.HandlerRouter.ProcessHandler(HttpContext context)
   at Telerik.Web.UI.WebResource.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)
2020-07-12 22:47:30,835 [YDAWBH120][Thread:80][ERROR] DotNetNuke.UI.WebControls.DNNListEditControl - System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at System.String.System.IConvertible.ToInt32(IFormatProvider provider)
   at System.Convert.ToInt32(Object value)
   at DotNetNuke.UI.WebControls.DNNListEditControl.get_OldIntegerValue()