Why can't I log in to the Madou account in my female companion?

It may be because the software is limited. See if the network firewall has turned off these softwares.

Or try to uninstall and reinstall the software. First, make sure there is something wrong with your mobile phone number, or it has been registered by others. Then, see if your mobile phone version is low or conflicts with that software. If there is a conflict, uninstall one.

Then it is to confirm whether your number has been registered. If you have registered, you can apply to change your password and log in. Secondly, make sure whether there is a network failure in your mobile phone. If there is a network failure, you can't log in.