The sync seems to have broken since yesterday. Here is part of the debug log from the Android app (the rest is just the same thing going back 24 hours).
2022-10-05T15:29:55 - [INFO][turtl_core::api] api::call() -- res(85): 200 GET https://apiv3.turtlapp.com/sync?sync_id=5416591&type=poll
2022-10-05T15:29:55 - [INFO][turtl_core::sync::incoming] SyncIncoming.update_local_db_from_api_sync() -- ignored 0 incoming syncs
2022-10-05T15:29:55 - [INFO][turtl_core::dispatch] dispatch::dispatch_event() -- sync:connected
2022-10-05T15:29:55 - [INFO][turtl_core::dispatch] dispatch::dispatch_event() -- sync:incoming
2022-10-05T15:29:55 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:29:56 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:29:57 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:29:58 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:29:59 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:00 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:00 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:01 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:02 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:03 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:04 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:05 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:06 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:07 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:08 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:09 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:10 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:11 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:12 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:13 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:14 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:15 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:16 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:17 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:17 - [INFO][turtl_core::api] api::call() -- res(85): 200 GET https://apiv3.turtlapp.com/sync?sync_id=5416591&type=poll
2022-10-05T15:30:17 - [INFO][turtl_core::sync::incoming] SyncIncoming.update_local_db_from_api_sync() -- ignored 0 incoming syncs
2022-10-05T15:30:17 - [INFO][turtl_core::dispatch] dispatch::dispatch_event() -- sync:connected
2022-10-05T15:30:18 - [INFO][turtl_core::dispatch] dispatch::dispatch_event() -- sync:incoming
2022-10-05T15:30:18 - [ERROR][turtl_core::sync] sync::runner() -- outgoing: main loop: {"err":{"message":"<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx/1.18.0</center>\r\n</body>\r\n</html>\r\n","subtype":"Not Found","type":"api"},"file":"src/api.rs","line":156,"wrapped":true}
2022-10-05T15:30:19 - [INFO][turtl_core::sync::outgoing] SyncOutgoing.run_sync() -- sending 17 sync items
2022-10-05T15:30:19 - [INFO][turtl_core::dispatch] dispatch(26): app:get-log