KB317835: Changes to the option "Allow joins across datasets based on unrelated common attributes" in dashboard properties cannot be saved in MicroStrategy Web 10.4

DSSErrors.log contains the following error:

Item "Join Across Datasets" is not found

 
CAUSE:
One possible cause is the definition of the system object "VLDB Select" is unexpected.
 
ACTION:
In order to track down the cause of this behavior, customers encountering this issue should make note of changes on configuration objects, Object Migrations, or error messages prior to experiencing the problem. Change Journaling, if it has been enabled, can help in preserving this information.
 
WORKAROUND:
Migrate system object "VLDB Select" from metadata of working environment or Strategy Tutorial metadata by following steps below:
1. In Object Manager, connect to project source which connects to metadata of the working environment or Strategy Tutorial metadata.
2. Create an object package.
3. Add one document into this package.
4. Click on "Add all used dependencies". All used dependencies including "VLDB Select" are added into the package.
5. Remove all other objects but keep only "VLDB Select" in the package. Change conflict resolution to "Force Replace". 
7. Click on proceed to generate the package.
6. Backup metadata in problem and then import this package.