Exchange 2013 CU7 ECP 500 Unexpected Error

I get the error "500 Unexpected Error" when i try to Login to the Exchange ECP. but OWA is normal, Plese help me.

Exchange error log:

System.Configuration.ConfigurationErrorsException: “”(hexadecimal value 0x03)is an invalid character. Line 1, position 1 (C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\ecp\quarantine\web.config line 1) ---> System.Xml.XmlException: “”(hexadecimal value 0x03)is an invalid character. Line 1, position 1
    System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
    System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
    System.Xml.XmlTextReaderImpl.ParseDocumentContent()
    System.Configuration.XmlUtil..ctor(Stream stream, String name, Boolean readToFirstElement, ConfigurationSchemaErrors schemaErrors)
    System.Configuration.BaseConfigurationRecord.InitConfigFromFile()

    System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
    System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
    System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
    System.Web.Configuration.RuntimeConfig.GetSectionObject(String sectionName)
    System.Web.Configuration.RuntimeConfig.GetSection(String sectionName, Type type, ResultsIndex index)
    System.Web.Configuration.RuntimeConfig.get_Authorization()
    System.Web.Security.UrlAuthorizationModule.IsUserAllowedToPath(HttpContext context, VirtualPath virtualPath)
    System.Web.SiteMapProvider.IsAccessibleToUser(HttpContext context, SiteMapNode node)
    Microsoft.Exchange.Management.ControlPanel.EacSiteMapProvider.IsAccessibleToUser(HttpContext context, SiteMapNode node)
    System.Web.StaticSiteMapProvider.GetChildNodes(SiteMapNode node)
    System.Web.XmlSiteMapProvider.GetChildNodes(SiteMapNode node)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateNavTree()
    Microsoft.Exchange.Management.ControlPanel._Default.OnLoad(EventArgs e)
    System.Web.UI.Control.LoadRecursive()
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
    System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
    System.Web.UI.Page.ProcessRequest()
    System.Web.UI.Page.ProcessRequest(HttpContext context)
    System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
    System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
    System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
    System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
    System.Web.Configuration.RuntimeConfig.GetSectionObject(String sectionName)
    System.Web.Configuration.RuntimeConfig.GetSection(String sectionName, Type type, ResultsIndex index)
    System.Web.Configuration.RuntimeConfig.get_Authorization()
    System.Web.Security.UrlAuthorizationModule.IsUserAllowedToPath(HttpContext context, VirtualPath virtualPath)
    System.Web.SiteMapProvider.IsAccessibleToUser(HttpContext context, SiteMapNode node)
    Microsoft.Exchange.Management.ControlPanel.EacSiteMapProvider.IsAccessibleToUser(HttpContext context, SiteMapNode node)
    System.Web.StaticSiteMapProvider.GetChildNodes(SiteMapNode node)
    System.Web.XmlSiteMapProvider.GetChildNodes(SiteMapNode node)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateDataContract(SiteMapNode sNode)
    Microsoft.Exchange.Management.ControlPanel._Default.CreateNavTree()
    Microsoft.Exchange.Management.ControlPanel._Default.OnLoad(EventArgs e)
    System.Web.UI.Control.LoadRecursive()
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
    System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
    System.Web.UI.Page.ProcessRequest()
    System.Web.UI.Page.ProcessRequest(HttpContext context)
    System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

System.Xml.XmlException: “”(hexadecimal value 0x03)is an invalid character. Line 1, position 1
    System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
    System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
    System.Xml.XmlTextReaderImpl.ParseDocumentContent()
    System.Configuration.XmlUtil..ctor(Stream stream, String name, Boolean readToFirstElement, ConfigurationSchemaErrors schemaErrors)
    System.Configuration.BaseConfigurationRecord.InitConfigFromFile()
    System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
    System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
    System.Xml.XmlTextReaderImpl.ParseDocumentContent()
    System.Configuration.XmlUtil..ctor(Stream stream, String name, Boolean readToFirstElement, ConfigurationSchemaErrors schemaErrors)
    System.Configuration.BaseConfigurationRecord.InitConfigFromFile()