Unable to select multiple values from within a search criteria (Query Builder)

Unable to select multiple values from within a search criteria (Query Builder)

Back in 2023 Genius developers helped me with a query filter so that we could run reports with multiple contracts.  The solution provided was: AND sc.Contract in (@filterContract)
in the Filter Contract search criteria, contracts were to be entered as: 'CCC','Santa Cruz'

This worked for a brief period of time, but this report no longer works.  Is it possible to run a report with multiple values in the search criteria?