NCP docker install issues

Hello friends,
I’m in the process of migrating my NCP instance from Raspberry Pi 4 to a new Intel based UnRAID server.
I’ve installed the NCP docker app from the UnRAID community apps and was able to log into the NCP dashboard and to the NC dashboard.
I uploaded my files and photos and things seemed to work ok using firefox on desktop MacOS.
However, now I’m seeing two issues:

  1. when I’m applying settings changes in the NCP dashboard I’m seeing an invalid origin message. (screenshot: https://imgur.com/JU6LMb1)

  2. When I initially setup NC on the new UnRAID saerver, I installed two TOTP NC apps: Two-Factor Authentication via Nextcloud notification and the Two-Factor TOTP Provider.
    Since I had both installed, after entering my username and password, the NC login page would ask me which TOTP option I would like to use. This worked as it should.
    I then decided to just work with the Two-Factor TOTP Provider app, and so I deleted the Two-Factor Authentication via Nextcloud notification app.
    However, even though I disabled and removed the Two-Factor Authentication via Nextcloud notification app, I’m still seeing the message to choose a particular TOTP solution with a message saying:

Two-factor authentication
Enhanced security is enabled for your account. Choose a second factor for authentication:
**Could not load at least one of your enabled two-factor auth methods. Please contact your admin.**

I then have an option to choose TOTP (Authenticator app) or use an TOTP backup password.
Is there a way to have the initial login page immediatly load the TOTP authenticator app provider after entering the username and password? That’s how it works on my Pi.
(screenshot: https://imgur.com/m8qwBZf)

  1. from time to time, when I open Nextcloud on my desktop browser I’m seeing the following error messages. (screenshot: https://imgur.com/5p0yVCJ)

  2. I now tried to completely disable TOTP, and as such the backup codes section in settings/security is now gone. Nevertheless, when I try to log in, the web interface still asks me to enter a Backup code. But non of the backup codes I previously had works, because I removed the TOTP provider app. Which means I can’t log in.

Hope someone can help.

Edit 1:
Added screenshots and the third issue.
Edit 2:
Added point 4.