AdGuard Home Error: control/stats/config | [object Object] | 404 Nginx reverse proxy under CloudFlare

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to report a bug and not [ask a question or ask for help](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a)

- [X] I have set up AdGuard Home correctly and [configured clients to use it](https://github.com/AdguardTeam/AdGuardHome/wiki/Clients). (Use the [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) for help with installing and configuring clients.)

### Platform (OS and CPU architecture)

Linux, ARM64

### Installation

GitHub releases or script from README

### Setup

On one machine

### AdGuard Home version

0.107.54

### Action

Try to install reverse proxy using https://adguard-dns.io/kb/ru/adguard-home/faq/#reverseproxy

### Expected result

Fully working reverse proxy to localhost (i make panel available only from localhost)

### Actual result

Work only main page, other pages not working


### Additional information and/or screenshots

Running on Ubuntu 24.04, not using Cloudflare origins, not modifying default reverse proxy config from guide