HTTP 503 response on startup causes crash

Specific error:

default 19:18:03.885087-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> received response, status 503 content K

In context:

default 19:18:03.850269-0400    Nimble  Connection 1: connected successfully
default 19:18:03.850310-0400    Nimble  Connection 1: TLS handshake complete
default 19:18:03.850532-0400    Nimble  Connection 1: ready C(N) E(N)
default 19:18:03.850747-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> now using Connection 1
default 19:18:03.850799-0400    Nimble  Connection 1: received viability advisory(Y)
default 19:18:03.852747-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> sent request, body N 0
default 19:18:03.885087-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> received response, status 503 content K
default 19:18:03.885137-0400    Nimble  Connection 1: read-side closed
default 19:18:03.885329-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> response ended
default 19:18:03.885418-0400    Nimble  Connection 1: cleaning up
default 19:18:03.885484-0400    Nimble  [C1 9E8772E0-530F-4D29-BA46-E308D2357544 Hostname#d52219e1:443 tcp, url hash: 5558627d, tls, definite, attribution: developer] cancel
default 19:18:03.886133-0400    Nimble  [C1 9E8772E0-530F-4D29-BA46-E308D2357544 Hostname#d52219e1:443 tcp, url hash: 5558627d, tls, definite, attribution: developer] cancelled
    [C1.1 99DC1CCE-6854-49FA-97DE-B624765A9602 10.192.122.11:49839<->IPv4#bd2f8a72:443]
    Connected Path: satisfied (Path is satisfied), viable, interface: utun3, ipv4, dns
    Privacy Stance: Not Eligible
    Duration: 0.168s, DNS @0.000s took 0.021s, TCP @0.023s took 0.036s, TLS 1.2 took 0.073s
    bytes in/out: 6209/910, packets in/out: 6/3, rtt: 0.033s, retransmitted bytes: 0, out-of-order bytes: 0
default 19:18:03.887058-0400    Nimble  nw_flow_disconnected [C1.1 IPv4#bd2f8a72:443 cancelled socket-flow ((null))] Output protocol disconnected
default 19:18:03.887327-0400    Nimble  nw_connection_report_state_with_handler_on_nw_queue [C1] reporting state cancelled
default 19:18:03.890288-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> done using Connection 1
default 19:18:03.890408-0400    Nimble  Task <5BA756A7-9FF1-40DF-AE07-4F8628C432CB>.<0> summary for task success {transaction_duration_ms=371, response_status=503, connection=1, protocol="http/1.1", domain_lookup_duration_ms=21, connect_duration_ms=109, secure_connection_duration_ms=72, private_relay=false, request_start_ms=333, request_duration_ms=0, response_start_ms=366, response_duration_ms=5, request_bytes=238, response_bytes=715, cache_hit=false}
default 19:18:03.890438-0400    Nimble  Connection 1: done
default 19:18:04.117904-0400    Nimble  [0x7fbd4f838c20] CVCGDisplayLink::finalize
default 19:18:04.117947-0400    Nimble  [0x7fbd4f838c20] CVDisplayLink::finalize
default 19:18:04.142637-0400    Nimble  Entering exit handler.
default 19:18:04.142678-0400    Nimble  Exiting exit handler.

Maybulb / Nimble

HTTP 503 response on startup causes crash #30