Anonymous User 9055193
(@anonymized-9055193)
Is it a Multisite installation? Often, Admins do not necessarily have the roles as Super Admins. They will have to double-check your Role credentials for a Multisite.
Sometimes, plugins are installed to facilitate Roles. If you can access FTP I would look to see if there are any Role management plugins installed. You may also look into the mu-plugins folder if it exists.
If you have access to the database, I would confirm to see if you are indeed an Admin.
Other than that, someone will have to re-issue new credentials or a database query will need to be performed on your username/email address.
Don’t worry, sometimes this happens 😉