Why some users cannot be assign issues in Jira?

[Vedat]

Hi!

When l create a issue in Jira, the user name l assign the issue cannot appear.

Why this is so?

l am waiting your answers.

Thanks a lot.

[Nic Brough -Adaptavist-]

Look at the project's permission scheme.  There is a permission rule in there that says "these people can have issues assigned to them".  The user you are trying to assign to does not match that rule.