I've just gone through the fun of a domain change on a SharePoint instance, and I've almost got everything working, except for things that rely on the Secure Store service. Unfortunately, the password for the master key was lost, so I've deleted the old Secure Store service, and created a new one.
Now I am attempting to recreate the target applications. For this example called "My Target"
However, when I click the final "Ok", SharePoint gives the message:
Failed to create the target application because of the following error:
Cannot finish this operation successfully. Please contact your administrator.
Looking through the ULS logs, the only clues I've been able to find are sampled below:
10/28/2015 18:47:12.01 w3wp.exe (0x3D9C) 0x4594
SharePoint Foundation Topology e5mc Medium
WcfSendRequest: RemoteAddress: 'https://spMyServer:32844/eea4e32b0f614bf4ac1b083bdcf48f7a/SecureStoreService.svc/https'
Channel: 'Microsoft.Office.SecureStoreService.Server.ISecureStoreServiceApplication'
Action: 'http://schemas.microsoft.com/sharepoint/2009/06/securestoreservice/ISecureStoreServiceApplication/GetApplication'
MessageId: 'urn:uuid:7147f0b9-ab10-4537-9383-048f181f3721' ce333c9d-44a7-d009-b44d-2dc4f75aa994
10/28/2015 18:47:12.03 w3wp.exe (0x1B90) 0x4334
SharePoint Foundation Monitoring nasq Medium
Entering monitored scope (ExecuteWcfServerOperation).
Parent No c7333c9d-943f-d009-b44d-23bdbfe15c67
10/28/2015 18:47:12.03 w3wp.exe (0x1B90) 0x4334
SharePoint Foundation Topology e5mb Medium
WcfReceiveRequest: LocalAddress: 'https://spMyServer.mydomain:32844/eea4e32b0f614bf4ac1b083bdcf48f7a/SecureStoreService.svc/https'
Channel: 'System.ServiceModel.Channels.ServiceChannel'
Action: 'http://schemas.microsoft.com/sharepoint/2009/06/securestoreservice/ISecureStoreServiceApplication/GetApplication'
MessageId: 'urn:uuid:7147f0b9-ab10-4537-9383-048f181f3721' ce333c9d-44a7-d009-b44d-2dc4f75aa994
10/28/2015 18:47:12.09 w3wp.exe (0x1B90) 0x4334
SharePoint Server Database ahjqp High
[Forced due to logging gap, cached @ 10/28/2015 18:47:12.08, Original Level: Verbose] SQL connection time: 0.1232 ce333c9d-44a7-d009-b44d-2dc4f75aa994
10/28/2015 18:47:12.09 w3wp.exe (0x1B90) 0x4334
Secure Store Service Secure Store elm4 High
SQL command failed: Sproc name: proc_sss_GetApplicationInfo,
Application Id: My Target, Error code: 80630490,
Error message: Target application not found (application id: My Target). ce333c9d-44a7-d009-b44d-2dc4f75aa994
10/28/2015 18:47:12.09 w3wp.exe (0x1B90) 0x433
Secure Store Service Secure Store efl2 High
GetApplication failed with the following exception:
System.ServiceModel.FaultException`1[Microsoft.Office.SecureStoreService.Server.SecureStoreServiceTargetApplicationNotFoundFault]:
Target application not found (application id: My Target).
(Fault Detail is equal to Microsoft.Office.SecureStoreService.Server.SecureStoreServiceTargetApplicationNotFoundFault). ce333c9d-44a7-d009-b44d-2dc4f75aa994
...
10/28/2015 18:47:21.40 w3wp.exe (0x3D9C) 0x44BC
Secure Store Service Secure Store 00000
Unexpected Claim is null on the resolved pickerentity. d0333c9d-b4ed-d009-b44d-2985afb5fa91