Description of problem:

The application starts, not crash, but not Ends the process of load the interface, the inner part of the window is fully gray, and I get this on terminal

nheko
MESA: error: ZINK: failed to choose pdev
glx: failed to create drisw screen
[2024-06-18 12:57:28.300] [ui] [info] Restoring window size 1066x600
[2024-06-18 12:57:28.980] [ui] [info] WebRTC: initialised GStreamer 1.24.4
[2024-06-18 12:57:30.487] [qml] [warning] Couldn't load VAAPI library (:0, )
[2024-06-18 12:57:30.684] [ui] [info] Loaded jdenticon plugin.
[2024-06-18 12:57:30.862] [qml] [warning] qrc:/resources/qml/Root.qml:11:1: el módulo «QtQuick.Window» no está instalado 
     import QtQuick.Window 
     ^ (qrc:/resources/qml/Root.qml:11, )
[2024-06-18 12:57:30.862] [qml] [warning] qrc:/resources/qml/Root.qml:10:1: el módulo «QtQuick.Controls» no está instalado 
     import QtQuick.Controls 
     ^ (qrc:/resources/qml/Root.qml:10, )
[2024-06-18 12:57:30.862] [qml] [warning] qrc:/resources/qml/Root.qml: el módulo «QtQml.WorkerScript» no está instalado (qrc:/resources/qml/Root.qml:-1, )
[2024-06-18 12:57:30.862] [qml] [warning] qrc:/resources/qml/Root.qml:8:1: el módulo «Qt.labs.platform» no está instalado 
     import Qt.labs.platform 1.1 as Platform 
     ^ (qrc:/resources/qml/Root.qml:8, )
[2024-06-18 12:57:30.862] [qml] [warning] qrc:/resources/qml/Root.qml:11:1: el módulo «QtQuick.Window» no está instalado 
     import QtQuick.Window 
     ^ (qrc:/resources/qml/Root.qml:11, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml:10:1: el módulo «QtQuick.Controls» no está instalado 
     import QtQuick.Controls 
     ^ (qrc:/resources/qml/Root.qml:10, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml: el módulo «QtQml.WorkerScript» no está instalado (qrc:/resources/qml/Root.qml:-1, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml:8:1: el módulo «Qt.labs.platform» no está instalado 
     import Qt.labs.platform 1.1 as Platform 
     ^ (qrc:/resources/qml/Root.qml:8, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml:11:1: el módulo «QtQuick.Window» no está instalado 
     import QtQuick.Window 
     ^ (qrc:/resources/qml/Root.qml:11, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml:10:1: el módulo «QtQuick.Controls» no está instalado 
     import QtQuick.Controls 
     ^ (qrc:/resources/qml/Root.qml:10, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml: el módulo «QtQml.WorkerScript» no está instalado (qrc:/resources/qml/Root.qml:-1, )
[2024-06-18 12:57:30.863] [qml] [warning] qrc:/resources/qml/Root.qml:8:1: el módulo «Qt.labs.platform» no está instalado 
     import Qt.labs.platform 1.1 as Platform 
     ^ (qrc:/resources/qml/Root.qml:8, )
[2024-06-18 12:57:30.864] [qml] [warning] qrc:/resources/qml/Root.qml:11:1: el módulo «QtQuick.Window» no está instalado 
     import QtQuick.Window 
     ^ (qrc:/resources/qml/Root.qml:11, )
[2024-06-18 12:57:30.864] [qml] [warning] qrc:/resources/qml/Root.qml:10:1: el módulo «QtQuick.Controls» no está instalado 
     import QtQuick.Controls 
     ^ (qrc:/resources/qml/Root.qml:10, )
[2024-06-18 12:57:30.864] [qml] [warning] qrc:/resources/qml/Root.qml: el módulo «QtQml.WorkerScript» no está instalado (qrc:/resources/qml/Root.qml:-1, )
[2024-06-18 12:57:30.864] [qml] [warning] qrc:/resources/qml/Root.qml:8:1: el módulo «Qt.labs.platform» no está instalado 
     import Qt.labs.platform 1.1 as Platform 
     ^ (qrc:/resources/qml/Root.qml:8, )
[2024-06-18 12:57:30.995] [ui] [info] starting nheko 0.12.0
[2024-06-18 12:57:31.092] [ui] [info] User already signed in, showing chat page
[2024-06-18 12:57:31.224] [ui] [info] Switching to chat page
[2024-06-18 12:57:31.224] [ui] [info] Unity service available: false
[2024-06-18 12:57:41.296] [db] [info] database ready
[2024-06-18 12:57:41.308] [db] [info] restoring state from cache
[2024-06-18 12:57:41.318] [db] [info] Removing old cached messages
[2024-06-18 12:57:41.328] [db] [info] Message removal done
[2024-06-18 12:57:41.476] [db] [info] Restored 24 rooms from cache
[2024-06-18 12:57:41.570] [crypto] [info] ed25519   : utyY171G9TucbOXZofvYNpkGxZ9ez/zwWJSxEF+bL/4
[2024-06-18 12:57:41.570] [crypto] [info] curve25519: 3P05SQm49+CU7uVlLvgTQwotT1ggL22KXvMd4HfrRnA
[2024-06-18 12:57:42.291] [crypto] [info] No key for online key backup.
[2024-06-18 12:57:45.141] [crypto] [info] Fetched server key count 50 signed_curve25519
[2024-06-18 12:57:45.166] [net] [info] TURN server(s) retrieved from homeserver:
[2024-06-18 12:57:45.166] [net] [info] username: 1718845064:@katnatek:matrix.org
[2024-06-18 12:57:45.166] [net] [info] ttl: 86400 seconds
[2024-06-18 12:57:45.166] [net] [info] uri: turn:turn.matrix.org:3478?transport=udp
[2024-06-18 12:57:45.166] [net] [info] uri: turn:turn.matrix.org:3478?transport=tcp
[2024-06-18 12:57:45.166] [net] [info] uri: turns:turn.matrix.org:443?transport=tcp
[2024-06-18 12:58:12.922] [mtx] [info] Skipping rule with unknown condition type: event_property_contains
[2024-06-18 12:58:12.922] [mtx] [info] Skipping rule with unknown condition type: event_property_is
[2024-06-18 12:58:12.923] [mtx] [info] Skipping rule with unknown condition type: event_property_is

I search on internet looks like 0.12.0 requires qtdeclarative6, I instatll it, and then I can start the application

How reproducible:


Steps to Reproduce:
1. Install nheko
2. Try to run nheko 
3. nheko start but show a gray window
4. Close nheko

To fix

Install 
1. qtdeclarative6
2. Run nheko
3. The application works as must