Testnet won't start syncing

[supertestnet]

I installed spruned and ran it on testnet. It never adds anything to headers.db but gets stuck in a loop where it outputs 16 lines to the spruned.log file over and over again. The first 15 of the loop look like this:

2021-09-06 19:27:41,861 - spruned.dependencies.connectrum - DEBUG - Connecting to: <ServerInfo testnet.hsmiths.com nick=657189accc069c00 ports="['s53012']" v=1.4 prune=0>

Except with various servers, nicknames, and ports. The last line of the loop looks like this:

2021-09-06 19:28:11,866 - root - DEBUG - Checking internet connectivity

Then it restarts the loop.

Before the loop starts, the following 14 lines appear:

2021-09-06 18:50:21,192 - root - DEBUG - Database migrations. Current version: 0, migrations available: 2
2021-09-06 18:50:21,293 - root - DEBUG - Erasing database because of wrong version
2021-09-06 18:50:21,309 - root - DEBUG - Arguments: Namespace(add_p2p_peer=None, cache_size=50, daemon=False, datadir='/home/pi/.spruned/', debug=False, disable_electrum_peer_discovery=False, disable_p2p_peer_discovery=False, electrum_server=None, keep_blocks=200, max_electrum_connections=None, max_p2p_connections=None, mempool_size=0, network=None, no_dns_seed=False, proxy=None, rpcbind='0.0.0.0', rpcpassword='[redacted]', rpcport=None, rpcuser='[redacted]', tor=False, version=False, zmqpubhashblock='', zmqpubhashtx='', zmqpubrawblock='', zmqpubrawtx='')
2021-09-06 18:50:21,317 - cache - INFO - No prev index found, trying to load
2021-09-06 18:50:21,318 - cache - INFO - No prev index found nor loaded
2021-09-06 18:50:21,320 - root - DEBUG - Checking internet connectivity
2021-09-06 18:50:22,881 - p2p - INFO - Connected to peer 24.130.230.138:18333 (Satoshi:0.20.1)
2021-09-06 18:50:22,987 - p2p - INFO - Connected to peer 62.210.99.100:18333 (Satoshi:0.20.0)
2021-09-06 18:50:23,023 - p2p - INFO - Connected to peer 104.248.38.48:18333 (Satoshi:0.20.1)
2021-09-06 18:50:23,027 - p2p - INFO - Connected to peer 46.101.189.209:18333 (Satoshi:0.20.1)
2021-09-06 18:50:23,030 - p2p - INFO - Connected to peer 13.69.26.150:18333 (Satoshi:0.21.1)
2021-09-06 18:50:23,040 - p2p - INFO - Connected to peer 195.201.93.52:18333 (Satoshi:0.20.99)
2021-09-06 18:50:33,004 - p2p - INFO - Connected to peer 46.101.189.209:18333 (Satoshi:0.20.1)
2021-09-06 18:50:33,012 - p2p - INFO - Connected to peer 13.69.26.150:18333 (Satoshi:0.21.1)