You might start with safe mode: https://discuss.uplift.us.us/safe-mode
But you should probably start with looking at your plugins.
Do you have other admin rights, e.g. on topics/posts?
If you ssh into your server you should be able to check your user for admin rights, for example on mine:
root@discourse-docker:~# /var/discourse/launcher enter app
root@discourse-docker-app:/var/www/discourse# rails c
[1] pry(main)> User.find_by(username: 'supermathie').admin?
=> true
If you want the list of admins, you can do:
[2] pry(main)> User.real.where(admin: true).pluck :username
=> ["supermathie"]