Question [Q] APP's administrator rights block lock screen options after uninstall


I've been using this app for a couple of days ( but decided I wanted to uninstall it again.

Now I followed the instructions by the author, so that the device administrator rights would be removed and I could remove the app.
However the 3 top options for the type of lock screen (the 3 that don't require a password) are still greyed out, and right below it says that these options are disabled by a device administrator.

I've checked the device administrator menu under security, and I only have ADM and Cerberus active, and those two were active before I tried the new app.

Help, what can I do to remove this? Is a factory reset the only solution?

Kind regards