...
Go to the Atlassian admin console https://admin.atlassian.com/ . Select organization.
Go to the Groups tabs and select
site-admins
group. Verify that the user who is going to authenticate the Jira app sync from zilla, is the you are member of thesite-admins
group.Go to
Product Access
from left menu. And Select selectAdministration access
. Addsite-admins
group underJira Administration
.