"No resized image available" and issue with 2FA after I moved

I recently moved from an apartment to a house. So what I did was I moved the server (a computer) from the apartment to the house. Since the Internet provider I used in the apartment was not available in the area as the house, I had to get a new Internet provider. I mention this because I am seeing a clear line from when this issue began, which was after I moved.

My issue is that I get the following prompt when trying to load an image from the nextcloud app:

I am also having an issue where I am unable to get past the 2FA. When I log in with my username and password, it brings me to the following page:

However, when I click the button, nothing happens. No change to the URL. The only email that I got was an email from the nextcloud server email I set it up with, with the following:

I’ve read that it could possibly be because of the database, it to be completely honest, I have no idea what I’m doing. I just followed a tutorial on YouTube😅.

Help would be greatly appreciated!!!