QWebEngine isn't loading one site

[zollex69]

Hi,
First of all, this is my first post here. Hopefully it's in the right category.
While building my browser for training purposes, I came across a problem which is that there are sites that don't load, such as bet365.com, that is, after loading the page (successful or not, I don't know) QWebEngineView remains white, no content appears, but other sites such as google.com or youtube.com load and have content displayed.

Screenshot of white window:

I don't get any errors during code execution.

The version of PyQt5 is 5.15.4

I also tried opening bet365.com in the browser that is presented in the Qt example, which uses PySide2, but here too, unfortunately, I got a failure.

Here is the browser code

class MyWebEngineUrlRequestInterceptor(QWebEngineUrlRequestInterceptor):
    def __init__(self, parent=None):
        super().__init__(parent)

    def interceptRequest(self, info):
        print("interceptRequest")
        print(info.requestUrl())

class MyWebEnginePage(QWebEnginePage):

    def acceptNavigationRequest(self, url, _type, isMainFrame):
        print("acceptNavigationRequest")
        print(url)
        return QWebEnginePage.acceptNavigationRequest(self, url, _type, isMainFrame)

     def certificateError(self, certificateError):
       print(certificateError.errorDescription(), certificateError.url(), certificateError.isOverridable())
       error = certificateError.error()

       return super(MyWebEnginePage, self).certificateError(certificateError)    

class Browser(QMainWindow):
    proxy_type = QNetworkProxy.HttpProxy
    proxy_hostname = 'proxy_hostname'
    proxy_port = 64777
    proxy_username = 'proxy_username'
    proxy_password = 'proxy_username'

    def __init__(self, url):
        super().__init__()
        self.searching_url = url
        self.set_auth_proxy()
        self.webEngineView = QWebEngineView()

        self.setMinimumSize(1200, 600)
        self.setCentralWidget(self.webEngineView)

        interceptor = MyWebEngineUrlRequestInterceptor()

        profile = QWebEngineProfile('storage', self.webEngineView)

        profile.setRequestInterceptor(interceptor)

        url = QUrl(self.searching_url)
        url.setScheme("http")
        url.setHost("www.bet365.com")
        httpReq = QWebEngineHttpRequest()
        httpReq.setUrl(url)
        httpReq.setMethod(QWebEngineHttpRequest.Get)
        httpReq.setHeader(QByteArray(b'Accept'), QByteArray(b'*/*'))
        
        httpReq.setHeader(QByteArray(b'Content-Type'), QByteArray(b'application/json'))
        httpReq.setHeader(QByteArray(b'User-Agent'), QByteArray(b'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36'))

        print(httpReq.header(QByteArray(b'Host')))

        page = MyWebEnginePage(profile, self.webEngineView)
        self.webEngineView.setPage(page)

        self.show()
        self.webEngineView.load(httpReq)

    def set_auth_proxy(self):
        self.auth_proxy = QNetworkProxy()
        self.auth_proxy.setType(self.proxy_type)
        self.auth_proxy.setHostName(self.proxy_hostname)
        self.auth_proxy.setPort(self.proxy_port)
        self.auth_proxy.setUser(self.proxy_username)
        self.auth_proxy.setPassword(self.proxy_password)
        self.auth_proxy.setApplicationProxy(self.auth_proxy)



if __name__ == '__main__':
    bet365 = 'https://www.bet365.com'    
    postman = 'http://postman-echo.com/get'

    app = QApplication(sys.argv)
    browser = Browser(bet365)
    sys.exit(app.exec_())

Also when I set the Host header like this httpReq.setHeader(QByteArray(b'Host'), QByteArray(b'www.bet365.com')), there is an error with the code ERR_INVALID_ARGUMENT in browser, I thought it was still about the headers when requesting, but no, I have set different headers and no luck.

What can I do to get bet365 to answer me correctly?