Input string was not in a correct format error when attempting to open the MDS page in IE

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

Input string was not in a correct format.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[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

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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4110.0

From the Event Viewer logs:

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 1/31/2020 9:02:14 AM 
Event time (UTC): 1/31/2020 2:02:14 PM 
Event ID: 0c02133a35fe43a497625288bf0e77f4 
Event sequence: 2 
Event occurrence: 1 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/1/ROOT/MDS-1-132249529331467317 
    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: 4284 
    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: 14 
    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)
 
 Any ideas?