Internal Server Error(500) when running Firewall Check

[JimbobNZ]

3CX: 15.0.59381.0
OS: Linux 3cx 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux

3CX: 15.0.59381.0
OS: Linux 3cx 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux
IniParser.Exceptions.ParsingException: Duplicated key 'MS_LOGLEVEL' found in section 'MSSettingsCache while parsing line number 0 with value '' - IniParser version: 2.2.2.0 while parsing line number 28 with value 'MS_LOGLEVEL = PT_INT32,2' - IniParser version: 2.2.2.0 ---> IniParser.Exceptions.ParsingException: Duplicated key 'MS_LOGLEVEL' found in section 'MSSettingsCache while parsing line number 0 with value '' - IniParser version: 2.2.2.0
   at IniParser.Parser.IniDataParser.HandleDuplicatedKeyInCollection(String key, String value, KeyDataCollection keyDataCollection, String sectionName)
   at IniParser.Parser.IniDataParser.AddKeyToKeyValueCollection(String key, String value, KeyDataCollection keyDataCollection, String sectionName)
   at IniParser.Parser.IniDataParser.Parse(String iniDataString)
   --- End of inner exception stack trace ---
   at IniParser.Parser.IniDataParser.Parse(String iniDataString)
   at IniParser.FileIniDataParser.ReadFile(Stream fs, Encoding fileEncoding)
   at ManagementConsoleJS.Services.FirewallChecker.LoadMediaConfig(PhoneSystem root, ApplicationConfiguration appConfig)
   at ManagementConsoleJS.Services.FirewallChecker.LoadConfig(ApplicationConfiguration appConfig)
   at ManagementConsoleJS.Services.FirewallService.Start()
   at lambda_method(Closure , Object , Object[] )
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at ManagementConsoleJS.Middleware.ExceptionWrapperMiddleware.d__3.MoveNext()