RDP: ERR failed to connect to origin error="websocket: bad handshake"

Hi, I am attempting to connect to a server (Windows 10 Enterprise) I have via RDP on macOS (11.3) and am unable to connect. The errors I receive are as following:

macOS Error output (Client trying to connect to server):

    % cloudflared access rdp --hostname rdp.domain.net --url localhost:2244
    2021-04-28T10:30:31Z INF Start Websocket listener host=localhost:2244
    A browser window should have opened at the following URL:

    https://rdp.domain.net/cdn-cgi/access/cli?redirect_url=https%3A%2F%2Frdp.domain.net%3Ftoken%3D{$TOKEN}%253D&send_org_token=true&token={$TOKEN}%3D

    If the browser failed to open, please visit the URL above directly in your browser.
    2021-04-28T10:32:15Z ERR failed to connect to origin error="websocket: bad handshake" originURL=https://rdp.domain.net

Windows 10 Enterprise error output (Server running tunnel, awaiting connection)

    PS C:\Cloudflared\bin> .\cloudflared.exe tunnel run
    2021-04-28T10:24:45Z INF Starting tunnel tunnelID={$UUID}
    2021-04-28T10:24:45Z INF Version 2021.4.0
    2021-04-28T10:24:45Z INF GOOS: windows, GOVersion: go1.15.7, GoArch: amd64
    2021-04-28T10:24:45Z INF Settings: map[cred-file:C:\Users\Admin\.cloudflared\${UUID}.json credentials-file:C:\Users\Admin\.cloudflared\${UUID}.json]
    2021-04-28T10:24:45Z INF cloudflared will not automatically update on Windows systems.
    2021-04-28T10:24:45Z INF Generated Connector ID: 8ab03d36-3d44-4fdd-9af0-ec4e7625ce5b
    2021-04-28T10:24:45Z INF Initial protocol h2mux
    2021-04-28T10:24:45Z INF Starting metrics server on 127.0.0.1:51437/metrics
    2021-04-28T10:24:46Z INF Connection d5ff74d1-a212-4208-a536-b120fe014b81 registered connIndex=0 location=AMS
    2021-04-28T10:24:46Z INF Connection cd587217-37e1-4f63-92b1-53aa07962e01 registered connIndex=1 location=LHR
    2021-04-28T10:24:47Z INF Connection 72b205e7-b09a-47df-a996-42f0414926d9 registered connIndex=2 location=AMS
    2021-04-28T10:24:48Z INF Connection ef33e060-034b-4c7c-991c-81048ea5cc86 registered connIndex=3 location=LHR
    2021-04-28T10:32:12Z ERR localhost:3389 is not a http service
    2021-04-28T10:32:12Z ERR CF-RAY: 646fa02738d954b7-MAN Proxying to ingress 0 error: Not a http service

I followed the setup instructions as described in this document.

Steps ran on Windows 10 Enterprise server:

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    PS C:\Windows\system32> cd C:\Cloudflared\bin\
    PS C:\Cloudflared\bin> .\cloudflared.exe service uninstall
    2021-04-28T08:58:55Z INF Uninstalling Argo Tunnel Windows Service windowsServiceName=Cloudflared
    2021-04-28T08:58:55Z INF Argo Tunnel agent service is uninstalled windowsServiceName=Cloudflared
    PS C:\Cloudflared\bin> .\cloudflared.exe tunnel login
    A browser window should have opened at the following URL:

    https://dash.cloudflare.com/argotunnel?callback=https%3A%2F%2Flogin.argotunnel.com%2F${DIGEST}%3D

    If the browser failed to open, please visit the URL above directly in your browser.
    You have successfully logged in.
    If you wish to copy your credentials to a server, they have been saved to:
    C:\Users\Admin\.cloudflared\cert.pem
    PS C:\Cloudflared\bin> .\cloudflared.exe tunnel create RDP
    Tunnel credentials written to C:\Users\Admin\.cloudflared\${UUID}.json. cloudflared chose this file based on where your origin certificate was found. Keep this file secret. To revoke these credentials, delete the tunnel.

    Created tunnel RDP with id ${UUID}
    PS C:\Cloudflared\bin> .\cloudflared.exe service install
    2021-04-28T10:13:14Z INF Installing Argo Tunnel Windows service
    2021-04-28T10:13:14Z INF Argo Tunnel agent service is installed windowsServiceName=Cloudflared
    PS C:\Cloudflared\bin> .\cloudflared.exe tunnel ingress validate
    Validating rules from C:\Users\Admin\.cloudflared\config.yml
    OK
    PS C:\Cloudflared\bin> .\cloudflared.exe tunnel run

Steps run on macOS client:

    [email protected] ~ % sudo port install cloudflared
    [email protected] ~ % cloudflared login
    A browser window should have opened at the following URL:

    https://dash.cloudflare.com/argotunnel?callback=https%3A%2F%2Flogin.argotunnel.com%2F{$DIGEST}%3D

    If the browser failed to open, please visit the URL above directly in your browser.
    You have successfully logged in.
    If you wish to copy your credentials to a server, they have been saved to:
    /Users/alex97/.cloudflared/cert.pem
    [email protected] ~ % cloudflared access rdp --hostname rdp.domain.net --url localhost:2244
    2021-04-28T10:30:31Z INF Start Websocket listener host=localhost:2244
    A browser window should have opened at the following URL:

    https://rdp.domain.net/cdn-cgi/access/cli?redirect_url=https%3A%2F%2Frdp.domain.net%3Ftoken%3D{$TOKEN}&send_org_token=true&token={$TOKEN}%3D

    If the browser failed to open, please visit the URL above directly in your browser.
    2021-04-28T10:32:15Z ERR failed to connect to origin error="websocket: bad handshake" originURL=https://rdp.domain.net

What my config.yml looks like on the server:

    tunnel: ${UUID}
    credentials-file: C:\Users\Admin\.cloudflared\${UUID}.json

    ingress:
      - hostname: rdp.domain.net
        service: rdp://localhost:3389
      - service: http_status:404
    # Catch-all rule, which responds with 404 if traffic doesn't match any of  
    # the earlier rules