Yes there are at least two other threads where members are reporting the this issue …which has been ongoing for over a month now …
The solution for now is a workaround to use the webpage not the App .
Hope you get it sorted soon .
https://forum.trustedhousesitters.com/t/verification-code-for-2fa-on-website-not-working
https://forum.trustedhousesitters.com/t/an-update-on-two-factor-authentication