Problem: Proxy (1) is not allowed for subsystem “SSIS” and user “Domain\UserName”. Grant permission by calling sp_grant_proxy_to_subsystem or sp_grant_login_to_proxy. (Microsoft SQL Server, Error: 14516)
Above error occurs when the user with the minimum permission (i.e. SQLAgentReaderRole and SQLAgentUserRole) or the user is configured as job owner and trying to run the job which is running under the proxy account security context.
You can execute below script to grant permission to the user and fix the error.
EXEC dbo.sp_grant_login_to_proxy @login_name = 'Domain\UserName', @proxy_name = 'Proxy Name' ; GO