Cannot find instance of connector with internal name %1. If this message appears on every scheduled synchronization, the ...

Cannot find instance of connector with internal name %1. If this message appears on every scheduled synchronization, the connector may have been improperly deleted outside of the Service Manager Console.

This can only occur in exceptional conditions when the connector is deleted but its associated schedule is still active. 
The workaround to prevent this error message is to export the ServiceManager.LinkingFramework.Configuration management pack and
edit it to remove the following rules and tasks:

Rule: %1_SyncRule

Task: %1_SyncNowTask

Task: %1_DeleteTask

 and then reimporting the management pack.

Cannot connect to the System Center Management service, please make sure that the service is running. See inner exception ... Cannot edit or view the workflow for any of the follow reasons: Workflow sources(*.xoml,*.xomlx, *.cs) are missing Workflow ... Cannot edit property {0} of the user account. This property can only be edited when the ManagementPackSecureReference and ... Cannot execute Match method on the object which does not have owner. Owner is required to establish internal infrastructure ... Cannot find instance of connector with internal name %1. If this message appears on every scheduled synchronization, the ... Cannot find the computer {FullyQualifiedComputerName} in the Active Directory forest supported by the domain controller {ADServer}. ... Cannot get the requested management pack element ID={0}]. The management pack ID={1}, KeyToken={2} that the referenced element ... Cannot get the value of the associated property: failed to setup internal infrastructure. Make sure that this PropertySource ... Cannot get the value of the associated property: this PropertySource object does not have owner dependency object. Owner ...