cannot receive data before headers

[rainzee]

I keep getting this error when I try to construct the request, and after checking the official documentation, it said it's a missing necessary header, but I can debug it successfully using the browser.

What could be causing this error?

`import httpx

def getMatch():
header = {
'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39'
}
client = httpx.Client(headers=header, http2=True, verify='riotgames.pem')
url = 'some_url'
request = httpx.Request("GET", url=url)
r = client.send(request)
print(r)

getMatch()`

httpx.LocalProtocolError: cannot receive data before headers

[lovelydinosaur]

My assumption here is that this is a server which is responding with an invalid HTTP/2 response.
The error indicates that the server is sending a data frame before having sent the response headers.

You might want to disable HTTP/2 for this case.

An alternative to digging in further would be to attempt the request with an alternate client, such as curl, for a good point of comparison. If you're able to share a completely reproducible example, including the URL you're accessing, then someone might be able to provide you with additional support.