I am receiving the following error (using 7.3.0):

Procedure or function 'UpdateServerActivity' expects parameter '@PingFailureCount', which was not supplied

[SqlException (0x80131904): Procedure or function 'UpdateServerActivity' expects parameter '@PingFailureCount', which was not supplied.]
   System.Data.SqlClient.SqlConnection. (SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +392
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +815
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4515
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +6738737
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds) +6741487
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +586
   System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite) +751
   System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +290
   PetaPoco.Database.Execute(String sql, Object[] args) +470
   DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteNonQuery(String connectionString, CommandType type, String sql, Object[] args) +23
   DotNetNuke.Data.DataProvider.UpdateServerActivity(String ServerName, String IISAppName, DateTime CreatedDate, DateTime LastActivityDate) +172
   DotNetNuke.Entities.Host.ServerController.UpdateServerActivity(ServerInfo server) +146
   DotNetNuke.Common.Initialize.InitializeApp(HttpApplication app, Boolean& initialized) +645
   DotNetNuke.Common.Initialize.Init(HttpApplication app) +148
   DotNetNuke.HttpModules.RequestFilter.RequestFilterModule.FilterRequest(Object sender, EventArgs e) +206
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +80
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165

Any ideas?

It is new. I install 7.3 and it works fine. Then I clone a desktop module from Github and simply build it in VS (version 12). That freezes my DNN with this message "Procedure or function 'UpdateServerActivity' expects parameter '@PingFailureCount', which was not supplied" and I have to reinstall DNN all over again (I dont even install the module). I did not have any problem with this module in 7.2.

Thank you so much Sebastian!

This is precisely what it did. I would not have found this error in a hundred years. I am so greatful for your help.

Peter