Recently in SSMS, I have started getting a blue question mark next to the database and SQL Server Agent, when previously all was showing running. At the same time my scheduled jobs have stopped running. We did have a reset of the server clock around the same time.

I have referenced this post Blue icon with question mark - what does it mean? but the problem persists. It is happening when I am working directly on the Database Server via remote desktop and via local computer SSMS.
On the Database Server,
Configuration Manger shows the services as running
WMI is not blocked and is enabled.
I have checked Windows Fire Wall and WMI is allowed.
I have restarted the SQL Agent. I have also stopped then started the Agent.
I have rebooted the Server. (I ensured there were no active users first.)
I have ensured that the agent is configured with "sp_configure 'Agent XPs', 1".
I modified the start date of each job that won't run to the current date. (I set up a new simple procedure to run as a test and it also won't execute.)
If I start a job manually; it starts but the Execute stalls the error is "A severe error occurred on the current command. The results, if any, should be discarded. (.Net SqlClient Data Provider)" which could indicates that the service is not running, but a "select * from sys.dm_server_services" indicates they are running.
I've checked the error log - it recommends verifying SQL Server is configured for remote connections, which it is.
There is an exception for the 1433 port to allow TCP/IP traffic on Port 1433.
Does anyone know of anything else that might help?
Here is the full error:
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) at Microsoft.SqlServer.Management.Common.ServerConnection.ExecuteWithResults(String sqlCommand, Boolean retry) at Microsoft.SqlServer.Management.Smo.ExecuteSql.ExecuteWithResults(String query) at Microsoft.SqlServer.Management.Smo.ExecuteSql.Execute(StringCollection query) at Microsoft.SqlServer.Management.Smo.ExecuteSql.ExecuteWithResults(String query, Object con) at Microsoft.SqlServer.Management.Smo.PostProcessJobActivity.GetColumnData(String name, Object data, DataProvider dp) at Microsoft.SqlServer.Management.Smo.DataProvider.ManipulateRowDataPostProcess() at Microsoft.SqlServer.Management.Smo.DataProvider.GetTable() at Microsoft.SqlServer.Management.Smo.SqlObjectBase.FillData(ResultType resultType, StringCollection sql, Object connectionInfo, StatementBuilder sb) at Microsoft.SqlServer.Management.Smo.SqlObjectBase.FillDataWithUseFailure(SqlEnumResult sqlresult, ResultType resultType) at Microsoft.SqlServer.Management.Smo.SqlObjectBase.BuildResult(EnumResult result) at Microsoft.SqlServer.Management.Smo.SqlObjectBase.GetData(EnumResult erParent) at Microsoft.SqlServer.Management.Sdk.Sfc.Environment.GetData() at Microsoft.SqlServer.Management.Sdk.Sfc.Environment.GetData(Request req, Object ci) at Microsoft.SqlServer.Management.Sdk.Sfc.Enumerator.GetData(Object connectionInfo, Request request) at Microsoft.SqlServer.Management.Smo.ExecutionManager.GetEnumeratorDataReader(Request req) at Microsoft.SqlServer.Management.Smo.SqlSmoObject.GetInitDataReader(String[] fields, OrderBy[] orderby) at Microsoft.SqlServer.Management.Smo.SqlSmoObject.ImplInitialize(String[] fields, OrderBy[] orderby) at Microsoft.SqlServer.Management.Smo.SqlSmoObject.OnPropertyMissing(String propname, Boolean useDefaultValue) at Microsoft.SqlServer.Management.Smo.PropertyCollection.RetrieveProperty(Int32 index, Boolean useDefaultOnMissingValue) at Microsoft.SqlServer.Management.Smo.PropertyCollection.GetValueWithNullReplacement(String propertyName, Boolean throwOnNullValue, Boolean useDefaultOnMissingValue) at Microsoft.SqlServer.Management.Smo.PropertyCollection.GetValueWithNullReplacement(String propertyName) at Microsoft.SqlServer.Management.Smo.Agent.Job.get_LastRunDate() at Microsoft.SqlServer.Management.SqlManagerUI.StartAgentJobs.WaitForJobToFinishAction.DoAction(ProgressItemCollection actions, Int32 index) at Microsoft.SqlServer.Management.SqlStudio.Controls.ProgressItemCollection.DoWorkOnThread() =================================== A severe error occurred on the current command. The results, if any, should be discarded. (.Net SqlClient Data Provider) ------------------------------ For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&ProdVer=15.00.4083&EvtSrc=MSSQLServer&EvtID=0&LinkId=20476 ------------------------------ Server Name: QUAD-DB2 Error Number: 0 Severity: 11 State: 0 ------------------------------ Program Location: at Microsoft.SqlServer.Management.Common.ConnectionManager.ExecuteTSql(ExecuteTSqlAction action, Object execObject, DataSet fillDataSet, Boolean catchException) at Microsoft.SqlServer.Management.Common.ServerConnection.ExecuteWithResults(String sqlCommand, Boolean retry)






