Seaquel
SQL Server error code

SQL Server error 9767

SQL Server raises error 9767 at severity 16, which marks a problem with the query or data that you can correct.

The security certificate bound to database principal (Id: %i) has been disabled for use with BEGIN DIALOG. See the Books Online topics "Certificates and Service Broker" for an overview and "ALTER CERTIFICATE (Transact-SQL)" for syntax to make a certificate ACTIVE FOR BEGIN_DIALOG.
Msg9767
Severity16
Group9000–9999

Source: Database Engine events and errors