The following comes up when we browse to https://servername.domainname.com/MDS/

Server Error in '/MDS' Application.

---

Input string was not in a correct format.

[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +14286718
   System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +174
   Microsoft.MasterDataServices.Core.Logging.FileTraceListener.<CreateFile>b__b(FileInfo f) +140
   System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count) +107
   System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count) +151
   System.Linq.EnumerableSorter`1.Sort(TElement[] elements, Int32 count) +29
   System.Linq.<GetEnumerator>d__1.MoveNext() +273
   Microsoft.MasterDataServices.Core.Logging.FileTraceListener.CreateFile() +594
   Microsoft.MasterDataServices.Core.Logging.FileTraceListener.Write(TraceEventType eventType, IEnumerable`1 messages) +484
   Microsoft.MasterDataServices.Core.Logging.FileTraceListener.Write(TraceEventType eventType, String message) +214
   System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message) +327
   Microsoft.MasterDataServices.WebUI.MDSApplication.Application_Start(Object sender, EventArgs e) +923

[HttpException (0x80004005): Input string was not in a correct format.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +546
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +171
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +255
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +347

[HttpException (0x80004005): Input string was not in a correct format.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +552
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +122
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +737

The following comes from the Event log:

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 1/30/2020 10:17:57 AM 
Event time (UTC): 1/30/2020 3:17:57 PM 
Event ID: 1802ea4138264ae4afed921a4103a578 
Event sequence: 2 
Event occurrence: 1 
Event detail code: 0 

Application information: 
    Application domain: /LM/W3SVC/1/ROOT/MDS-5-132248710769135931 
    Trust level: Full 
    Application Virtual Path: /MDS 
    Application Path: C:\Program Files\Microsoft SQL Server\130\Master Data Services\WebApplication\ 
    Machine name: LLB-SQLQSMDS01 

Process information: 
    Process ID: 6656 
    Process name: w3wp.exe 
    Account name: LLBEAN\svc-sqlsmdswebq 

Exception information: 
    Exception type: HttpException 
    Exception message: Input string was not in a correct format.
   at System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

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 Microsoft.MasterDataServices.Core.Logging.FileTraceListener.<CreateFile>b__b(FileInfo f)
   at System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count)
   at System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count)
   at System.Linq.EnumerableSorter`1.Sort(TElement[] elements, Int32 count)
   at System.Linq.OrderedEnumerable`1.<GetEnumerator>d__1.MoveNext()
   at Microsoft.MasterDataServices.Core.Logging.FileTraceListener.CreateFile()
   at Microsoft.MasterDataServices.Core.Logging.FileTraceListener.Write(TraceEventType eventType, IEnumerable`1 messages)
   at Microsoft.MasterDataServices.Core.Logging.FileTraceListener.Write(TraceEventType eventType, String message)
   at System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message)
   at Microsoft.MasterDataServices.WebUI.MDSApplication.Application_Start(Object sender, EventArgs e)



Request information: 
    Request URL: https://llb-sqlqsmds01.llbean.com:443/MDS/ 
    Request path: /MDS/ 
    User host address: ::1 
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: LLBEAN\svc-sqlsmdswebq 

Thread information: 
    Thread ID: 26 
    Thread account name: LLBEAN\svc-sqlsmdswebq 
    Is impersonating: False 
    Stack trace:    at System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)