Error on opening Publishing App. 'Resource download failed. Please check Metastore URL preference setting or contact system administrator.'

As the error suggests first check the preference:

•  Log into Spotfire Analyst as Admin.
• Tools > Administration Manager > Preferences
• Select the appropriate group for target users with problem.
• In the preferences select Signals Lead Discovery (SLD) or Signals Inventa (SIa) > General
• Check if SDF Base URL has been set (NB The Metastore URL is derived from this Base URL).

If this has been set and the error persists make sure that the version of SLD/SIa that has been deployed to the Spotfire Server are in keeping with the Service versions that have been installed on the Kubernetes cluster with the Signals Data Factory. To check versions installed please go here

As a further example, if you have deployed Signals Screening 2.5 to the Spotfire Server BUT are still using earlier goods on the Kubernetes cluster, namely 2.4  service versions. You will also receive an error of the form: 'Error on opening Publishing App. 'Resource download failed....'

However, this could be misleading. If in doubt more specific logging can be found in the Spotfire Client logs:

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PerkinElmer.Signals.Client.SignalsRestfulClient [(null)] - Starting HTTP Request [56772630] - Method: GET, RequestUri: http://Your_SDF_Base_URL/sld/publish-tool/index.html

2022-01-17T11:28:13,154+00:00 2022-01-17 11:28:13,154 spotfireadmin [35] DEBUG PerkinElmer.Signals.Client.SignalsRestfulClient [(null)] - Finished HTTP Request [56772630] - StatusCode: NotFound, Elapsed: 40.4034 ms

2022-01-17T11:28:13,155+00:00 2022-01-17 11:28:13,155 spotfireadmin [Web Server Worker Thread #3] ERROR PerkinElmer.Spotfire.Race.DataPublish.CustomVisual.DataPublishVisualView [(null)] - PerkinElmer.Signals.Client.SignalsNotFoundException: Signals Not Found.

MeasurementType has been deleted or you don't have permission to view.

   at PerkinElmer.Signals.Client.AsyncHelper.ExclusiveSynchronizationContext.BeginMessageLoop()

   at PerkinElmer.Signals.Client.AsyncHelper.RunSync[T](Func`1 task)

   at PerkinElmer.Spotfire.Race.DataPublish.CustomVisual.DataPublishVisualView.GetAuthResourceCore(String path, NameValueCollection query, DataPublishVisual snapshotNode)

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The above is indicative of trying to get a web resource that is only available in version 2.5 or above.