How to set up PingID 2FA with third party OTP app [migrated]

I would like to be able to generate pingID 2FA keys from a generic OTP app as freeOTP for Android or the OTP app of my smartwatch.

The service allows me to enrol 2 devices and at the moment I have a device with the official “pindID” client.

To enrol the 2nd device the admin page generates a QR and provides a key/string

However, from Android apps (freeOTP, freeOTP+,Aegis) I tried to read a QR token but i receive the message “token is invalid”.

I haven’t tried to configure the OTP app manually as I have no information for the configuration.