Hello @anderslinn
Thank you for using our plugin.
Most probably you have restricted access to the plugin settings before and now since you have a new admin, you cannot access the plugin settings. There are two ways how you can solve this:
1) The easiest way is to delete the plugin settings from the database. When you do so, you are only deleting the plugin settings and not the configured 2FA profiles of your users. So you can easily delete the settings and reconfigure the plugin.
To delete the plugin settings simply delete the row with wp_2fa_settings wp_2fa_settings as option_name in the wp_options table.
2) If you do not want to delete all the settings and reconfigure them, use a plugin such as Better Search Replace to delete the entry limit_access from the plugin settings in the database. You need to use a plugin because the settings are stored as serialized data in the database.
The above will do the trick. Should you require any further assistance, please do not hesitate to ask.
Once you regain access and continue using the plugin, please do not forget to rate our plugin and service. These ratings really help us.
Thank you very much.