Fetch failed: Failed to fetch

What type of hardware are you using: VPS bought online
What YunoHost version are you running: 12.0.7 (stable).
What app is this about: Vaultwarden, Nextcloud, Element Call and more

Describe your issue

My mother tongue is Turkish. I use a translation tool.

First of all, I would like to explain how I use Yunohost for the VPS I am using. I have a server on oracle cloud with 4 Arm-based processors and 24 gb memory. Due to the lack of debian 12 on the oracle cloud platform, I converted my Canonical Ubuntu 22.04 operating system to Debian GNU/Linux 12 (bookworm) operating system with the method on the link How to setup YunoHost at Oracle free tier VM (works on AMD and ARM servers) · GitHub and installed Yunohost in this way.

The problem I had was that I got a “fetch failed: Failed to fetch” error in most applications, but not in all applications. Examples of these applications that I have experienced are some extensions on Next cloud, vaultwarden, element call and more. I’m not sure how to show you the error I’m getting, but the warnings I’m seeing with the inspect button on the browser are as follows

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Share relevant logs or error messages

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Failed to load resource: net::ERR_CONNECTION_REFUSEDUnderstand this errorAI
localhost:8008/_matrix/client/v3/register:1

   Failed to load resource: net::ERR_CONNECTION_REFUSEDUnderstand this errorAI

rageshake.ts:492 ConnectionError: fetch failed: Failed to fetch
at A$.requestOtherUrl (fetch.ts:327:19)
at async NO.doRequest (interactive-auth.ts:508:28)
window.console. @ rageshake.ts:492Understand this errorAI
element-call.doranpierst.com.tr/:1 The resource https://element-call.doranpierst.com.tr/config.json was preloaded using link preload but not used within a few seconds from the window’s load event. Please make sure it has an appropriate as value and it is preloaded intentionally.Understand this warningAI
localhost:8008/_matrix/client/v3/register:1

   Failed to load resource: net::ERR_CONNECTION_REFUSEDUnderstand this errorAI

rageshake.ts:492 ConnectionError: fetch failed: Failed to fetch
at A$.requestOtherUrl (fetch.ts:327:19)
at async NO.doRequest (interactive-auth.ts:508:28)
window.console. @ rageshake.ts:492Understand this errorAI
element-call.doranpierst.com.tr/:1 The resource https://element-call.doranpierst.com.tr/config.json was preloaded using link preload but not used within a few seconds from the window’s load event. Please make sure it has an appropriate as value and it is preloaded intentionally.Understand this warningAI