Problem running meek server without CDN, stuck at Performing bandwidth self-test...done

I am trying to run a meek server, and this is what I have done for the test:

I have a domain (for example, call it example.com) and I manually applied for Let's Encrypt SSL certificate, so I can visit the website through https://example.com.

Here is the torrc:

BridgeRelay 1 ORPort 9001 ExtORPort auto SocksPort 0 ExitPolicy reject :

ServerTransportListenAddr meek 0.0.0.0:443

ServerTransportPlugin meek exec /usr/local/bin/meek-server --cert /etc/letsencrypt/live/example.com/fullchain.pem --key /etc/letsencrypt/live/example.com/privkey.pem --log /var/log/tor/meek-server.log

However, when I enter "tor -f torrc", it stuck here: Jul 20 15:29:53.566 [notice] Tor 0.3.2.10 (git-0edaa32732ec8930) running on Linux with Libevent 2.1.8-stable, OpenSSL 1.0.2g, Zlib 1.2.11, Liblzma 5.2.2, and Libzstd 1.3.1. Jul 20 15:29:53.567 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Jul 20 15:29:53.567 [notice] Read configuration file "/xxx/torrc". Jul 20 15:29:53.574 [notice] Your ContactInfo config option is not set. Please consider setting it, so we can contact you if your server is misconfigured or something else goes wrong. Jul 20 15:29:53.574 [notice] Based on detected system memory, MaxMemInQueues is set to 739 MB. You can override this by setting MaxMemInQueues by hand. Jul 20 15:29:53.576 [notice] Scheduler type KIST has been enabled. Jul 20 15:29:53.576 [notice] Opening OR listener on 0.0.0.0:9001 Jul 20 15:29:53.576 [notice] Opening Extended OR listener on 127.0.0.1:0 Jul 20 15:29:53.577 [notice] Extended OR listener listening on port 40651. Jul 20 15:29:54.000 [warn] Failed to open GEOIP file /usr/share/tor/geoip. We've been configured to see which countries can access us as a bridge, and we need GEOIP information to tell which countries clients are in. Do you have the tor-geoipdb package installed? Jul 20 15:29:54.000 [warn] Failed to open GEOIP file /usr/share/tor/geoip6. We've been configured to see which countries can access us as a bridge, and we need GEOIP information to tell which countries clients are in. Do you have the tor-geoipdb package installed? Jul 20 15:29:54.000 [notice] Configured to measure directory request statistics, but no GeoIP database found. Please specify a GeoIP database using the GeoIPFile option. Jul 20 15:29:54.000 [warn] You are running Tor as root. You don't need to, and you probably shouldn't. Jul 20 15:29:56.000 [notice] Your Tor server's identity key fingerprint is 'Unnamed E8094BFxxxxxxxxxx5C1E' Jul 20 15:29:56.000 [notice] Your Tor bridge's hashed identity key fingerprint is 'Unnamed BBAA6xxxxxxxxxAA811B' Jul 20 15:29:56.000 [notice] Bootstrapped 0%: Starting Jul 20 15:30:03.000 [notice] Starting with guard context "default" Jul 20 15:30:03.000 [notice] Bootstrapped 80%: Connecting to the Tor network Jul 20 15:30:03.000 [notice] Bootstrapped 85%: Finishing handshake with first hop Jul 20 15:30:04.000 [warn] Server managed proxy encountered a method error. (meek listen tcp 0.0.0.0:443: bind: address already in use) Jul 20 15:30:04.000 [warn] Managed proxy at '/usr/local/bin/meek-server' failed the configuration protocol and will be destroyed. Jul 20 15:30:04.000 [notice] Bootstrapped 90%: Establishing a Tor circuit Jul 20 15:30:06.000 [notice] Tor has successfully opened a circuit. Looks like client functionality is working. Jul 20 15:30:06.000 [notice] Bootstrapped 100%: Done Jul 20 15:30:06.000 [notice] Now checking whether ORPort 45.xxx.xxx.xxx:9001 is reachable... (this may take up to 20 minutes -- look for log messages indicating success) Jul 20 15:30:09.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor. Jul 20 15:31:14.000 [notice] Your network connection speed appears to have changed. Resetting timeout to 60s after 18 timeouts and 442 buildtimes. Jul 20 15:31:20.000 [notice] Performing bandwidth self-test...done.

And then it has no output and seems not working. Besides the above one, once I also got the output:

... Jul 20 08:24:27.000 [notice] Performing bandwidth self-test...done. Jul 20 09:23:17.000 [notice] No circuits are opened. Relaxed timeout for circuit 30 (a Measuring circuit timeout 3-hop circuit in state doing handshakes with channel state open) to 60000ms. However, it appears the circuit has timed out anyway.

What's wrong with my steps in setting the meek server? What should I do next to set up a meek server, either for use or for test? Must I use CDN to domain fronting it? By the way, is it possible to use meek without domain fronting if the domain has not been filtered? May be I misunderstood something in https://trac.torproject.org/projects/tor/wiki/doc/meek#Howtorunameek-serverbridge and meek's README and I am sorry for that.

Trac:
Username: weiruo