Nextcloud 2FA borked. All admins locked out

[parthmaniar]

Sounds a lot like what I faced. Check this thread and see if the steps I took help:

Administrator account locked out due to 2FA enforcement

I upgraded to Nextcloud 15 using the beta channel. I am running this on a Raspberry Pi with Apache. For whatever reason whenever I am trying to login with administrator ID post the upgrade it says " Could not load at least one of your enabled two-factor auth methods. Please contact your admin.". Now this is for the only administrator account for the installation. is there a way I can disable two factor authentication on the installation using occ (as I read on few threads). Can someone please …