No editor

In the Appearance menu the Editor is missing. The menu looks as in image
When going to the URL … .se/wp-admin/theme-editor.php there is a message: You do not have sufficient permissions to access this page.
I am logged in as an admin.
Any suggestions please.

If you’re not on multisite, then it’s probably deactivated by your host. Send them a message and ask.

Thank you. You were right, fixed with the host.