Hi @Bilal H. Bhatt,
Make sure that the account the SQL Server Agent runs under has the necessary permissions to execute every single step of your package.
You may consider using proxy account which has full permission to connect to SSAS server and run the job.
Here is an official documentation for your reference: create-a-sql-server-agent-proxy
For more information, see running-a-ssis-package-from-sql-server-agent-using-a-proxy-account.
Regards,
Zoe Hui
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