As a security measure to prevent accidental or malicious modification of Jobs, from Talend 7.1 onwards, when saving a task or receiving a generated Job from the Talend CommandLine, the Talend JobServer will verify whether it has a valid signature before running it. You will need to migrate existing unsigned Jobs within a grace period of 90 days upon setting your license for Talend Administration Center, or set a migration token for them if you still want to run or migrate them after the grace period.