Jitis is reconnecting every 30 sec

Hey! I cant get jitsi to work and I am getting the same JS Console output every time it tryes to connect:

(TIME) index.html loaded:	 176.92499980330467
Logger.js:154 2020-12-05T14:27:40.635Z [modules/browser/BrowserCapabilities.js] <new a>:  This appears to be chrome, ver: 86.0.4240.198
Logger.js:154 2020-12-05T14:27:40.779Z [modules/UI/videolayout/VideoLayout.js] <Object.changeUserAvatar>:  Missed avatar update - no small video yet for undefined
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:40.785Z [modules/RTC/RTCUtils.js] <Y.init>:  Disable AP: false
Logger.js:154 2020-12-05T14:27:40.786Z [modules/statistics/AnalyticsAdapter.js] <Object.dispose>:  Disposing of analytics adapter.
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:40.786Z [features/analytics] Initialized 0 analytics handlers
Logger.js:154 2020-12-05T14:27:40.786Z [features/base/media] Start muted: 
Logger.js:154 2020-12-05T14:27:40.787Z [features/base/media] Start audio only set to false
Logger.js:154 2020-12-05T14:27:40.836Z [index.web] <HTMLDocument.<anonymous>>:  (TIME) document ready:	 381.6449998412281
olm.js:33 wasm streaming compile failed: TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.
(anonymous) @ olm.js:33
olm.js:33 falling back to ArrayBuffer instantiation
(anonymous) @ olm.js:33
Logger.js:154 2020-12-05T14:27:40.861Z [modules/RTC/RTCUtils.js] list of media devices has changed: Array(9)
Logger.js:154 2020-12-05T14:27:40.886Z [modules/RTC/RTCUtils.js] Audio output device set to default
Logger.js:154 2020-12-05T14:27:40.973Z [modules/xmpp/xmpp.js] <A._initStrophePlugins>:  P2P STUN servers:  Array(1)
Logger.js:154 2020-12-05T14:27:40.985Z [modules/xmpp/xmpp.js] <A.connectionHandler>:  (TIME) Strophe connecting:	 530.5949999019504
Logger.js:154 2020-12-05T14:27:40.987Z [modules/RTC/RTCUtils.js] <Y.newObtainAudioAndVideoPermissions>:  Using the new gUM flow
Logger.js:154 2020-12-05T14:27:40.988Z [modules/RTC/RTCUtils.js] <Y.<anonymous>>:  Got media constraints:  Object
registrator.js:9 DOMException: Failed to register a ServiceWorker for scope ('https://meet.k3.network/') with script ('https://meet.k3.network/pwa-worker.js'): The script has an unsupported MIME type ('text/html').
Logger.js:154 2020-12-05T14:27:41.082Z [modules/RTC/RTCUtils.js] Failed to get access to local media.  NotFoundError: Requested device not found [object Object] 
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.083Z [features/base/tracks] Failed to create local tracks Array(2) s
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.083Z [modules/RTC/RTCUtils.js] <Y.newObtainAudioAndVideoPermissions>:  Using the new gUM flow
Logger.js:154 2020-12-05T14:27:41.083Z [modules/RTC/RTCUtils.js] <Y.<anonymous>>:  Got media constraints:  Object
Logger.js:154 2020-12-05T14:27:41.084Z [JitsiMeetJS.js] <Object.getGlobalOnErrorHandler>:  UnhandledError: null Script: null Line: null Column: null StackTrace:  Error: Strophe: Websocket closed unexcectedly
    at Object.r.Strophe.log (strophe.util.js:89)
    at Object.error (strophe.umd.js:1392)
    at N.Websocket._onClose (strophe.umd.js:5684)
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.084Z [modules/xmpp/strophe.util.js] <Object.r.Strophe.log>:  Strophe: Websocket closed unexcectedly
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.084Z [modules/xmpp/xmpp.js] <A.connectionHandler>:  (TIME) Strophe connfail[The WebSocket connection could not be established or was disconnected.]:	 629.8199999146163
Logger.js:154 2020-12-05T14:27:41.084Z [modules/xmpp/xmpp.js] <A.connectionHandler>:  (TIME) Strophe disconnected:	 630.0799997989088
Logger.js:154 2020-12-05T14:27:41.085Z [modules/statistics/statistics.js] <Function.b.sendAnalyticsAndLog>:  {"type":"operational","action":"connection.failed","attributes":{"error_type":"connection.otherError","error_message":"The WebSocket connection could not be established or was disconnected.","suspend_time":0,"time_since_last_success":null}}
Logger.js:154 2020-12-05T14:27:41.085Z [connection.js] <a.d>:  CONNECTION FAILED: connection.otherError
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.088Z [features/overlay] <Object.componentDidMount>:  The conference will be reloaded after 11 seconds.
Logger.js:154 2020-12-05T14:27:41.090Z [features/base/connection] connection.otherError
o @ Logger.js:154
Logger.js:154 2020-12-05T14:27:41.120Z [modules/RTC/RTCUtils.js] onUserMediaSuccess
Logger.js:154 2020-12-05T14:27:42.768Z [features/base/redux] <Object.persistState>:  redux state persisted. 09a3ab7ac369ecee6788f457407cf130 -> e92bfa3d2471a85c2b436bd07d0d9560
DevTools failed to load SourceMap: Could not load content for chrome-extension://gannpgaobkkhmpomoijebaigcapoeebl/bundle.min.js.map: HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME

​Does anyone know where the problem is?

How did you install it? Is there any guide you followed?

Docker Compose
I used this Tutorial: https://adminforge.de/linux-allgemein/eigene-jitsi-meet-instanz-installieren-docker-ubuntu-nginx/

This is different than the official guide