User cannot connect to Tor, pluggable transports fail: macOS 10.12.6/TB 13.0.13

The user needs to use pluggable transports to connect to Tor.

Logs with webtunnel:

[NOTICE] DisableNetwork is set. Tor will not make or accept non-control network connections. Shutting down all existing connections.
[NOTICE] Opening Socks listener on 127.0.0.1:9150
[NOTICE] Opened Socks listener connection (ready) on 127.0.0.1:9150
[WARN] Managed proxy "PluggableTransports/webtunnel-client" process terminated with status code 6
[ERR] tor_assertion_failed_: Bug: src/feature/client/transports.c:519: proxy_prepare_for_restart: Assertion mp->conf_state == PT_PROTO_COMPLETED failed; aborting. (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug: Tor 0.4.8.10 (git-680415826c5fd786): Assertion mp->conf_state == PT_PROTO_COMPLETED failed in proxy_prepare_for_restart at src/feature/client/transports.c:519: . Stack trace: (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     0   tor                                 0x0000000107c4a7e9 log_backtrace_impl + 89 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     1   tor                                 0x0000000107c575bd tor_assertion_failed_ + 317 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     2   tor                                 0x0000000107c279d6 proxy_prepare_for_restart + 502 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     3   tor                                 0x0000000107c293c3 managed_proxy_exit_callback + 115 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     4   tor                                 0x0000000107c62cc1 process_notify_event_exit + 113 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     5   tor                                 0x0000000107c64c35 notify_pending_waitpid_callbacks + 293 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     6   libevent-2.1.7.dylib                0x000000010818e3f4 event_process_active_single_queue + 772 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     7   libevent-2.1.7.dylib                0x000000010818a60c event_base_loop + 1356 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     8   tor                                 0x0000000107bc0f8c do_main_loop + 268 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     9   tor                                 0x0000000107bbc149 tor_run_main + 297 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     10  tor                                 0x0000000107c244bb tor_main + 75 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     11  tor                                 0x0000000107aa901b main + 27 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     12  libdyld.dylib                       0x00007fffbe34a235 start + 1 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     13  ???                                 0x0000000000000017 0x0 + 23 (on Tor 0.4.8.10 680415826c5fd786)

Logs with lyrebird

[NOTICE] DisableNetwork is set. Tor will not make or accept non-control network connections. Shutting down all existing connections.
[NOTICE] Opening Socks listener on 127.0.0.1:9150
[NOTICE] Opened Socks listener connection (ready) on 127.0.0.1:9150
[WARN] Managed proxy "PluggableTransports/lyrebird" process terminated with status code 6
[ERR] tor_assertion_failed_: Bug: src/feature/client/transports.c:519: proxy_prepare_for_restart: Assertion mp->conf_state == PT_PROTO_COMPLETED failed; aborting. (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug: Tor 0.4.8.10 (git-680415826c5fd786): Assertion mp->conf_state == PT_PROTO_COMPLETED failed in proxy_prepare_for_restart at src/feature/client/transports.c:519: . Stack trace: (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     0   tor                                 0x0000000107fd97e9 log_backtrace_impl + 89 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     1   tor                                 0x0000000107fe65bd tor_assertion_failed_ + 317 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     2   tor                                 0x0000000107fb69d6 proxy_prepare_for_restart + 502 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     3   tor                                 0x0000000107fb83c3 managed_proxy_exit_callback + 115 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     4   tor                                 0x0000000107ff1cc1 process_notify_event_exit + 113 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     5   tor                                 0x0000000107ff3c35 notify_pending_waitpid_callbacks + 293 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     6   libevent-2.1.7.dylib                0x000000010851a3f4 event_process_active_single_queue + 772 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     7   libevent-2.1.7.dylib                0x000000010851660c event_base_loop + 1356 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     8   tor                                 0x0000000107f4ff8c do_main_loop + 268 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     9   tor                                 0x0000000107f4b149 tor_run_main + 297 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     10  tor                                 0x0000000107fb34bb tor_main + 75 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     11  tor                                 0x0000000107e3801b main + 27 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     12  libdyld.dylib                       0x00007fffbe34a235 start + 1 (on Tor 0.4.8.10 680415826c5fd786)
[ERR] Bug:     13  ???                                 0x0000000000000017 0x0 + 23 (on Tor 0.4.8.10 680415826c5fd786)