Hi cimo95,
Welcome to the Community. We're sorry to hear you're having this issue.
The TouchID utilises the fingerprint technology on iOS/Android devices as a login method to the PayPal Consumer App. If after re-enabling the TouchID it still does not work, I would suggest that you uninstall the App and install it again.
For more information on how to enable your TouchID, you can click here.
Hope this helps,
Adam
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