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It is also possible that this site is not active because you have not logged in a while.
Unused sites are automatically disabled after 30 days without a valid login (only a week if the site is empty).
Disabled sites are permanently and irreversibly deleted from our backups three months later.
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If more than four months have passed since your last valid access then it has been permanently deleted.
Unfortunately we have very few resources and we cannot afford to keep unused sites open indefinitely.
In any case you can always open a new moodle site on gnomio.com, even with the same name.