Bug: network error when saving a reminder for expiry date

[Magnus Stolpe]

When creating a new card and set a expiry date and time and set the reminder to be at the the expiry time and then save the card (after adding myself to the card in the popup) the reminder is not set. Going back to the expiry date settings show that the reminder is ”None”. If I set the reminder again it sticks.

I find the error report below at the exact same time as the card is saved.

This bug has been around for a year or so. I thought it would be fixed but nothing happens with this bug.

{
"metadata" : {
"appVersion" : "2026.14 (20260707.204116)",
"applicationName" : "Trello.app",
"date" : "2026-07-27T19:54:14Z",
"detailPreview" : "The server responded with an HTTP error code. statusCode: 400",
"deviceModel" : "iPhone15,2",
"deviceType" : "iPhone",
"memoryFree" : 308936704,
"memoryTotal" : 5108940800,
"osVersion" : "26.5.2",
"reachabilityFlags" : "<unreachable>",
"storageFree" : 5660491776,
"storageTotal" : 127124078592,
"title" : "Networking Error"
},
"payload" : {
"errorText" : "Domain: com.trello.error.trelloapi\nCode: -12\nDescription: The server responded with an HTTP error code. statusCode: 400\nUserInfo: [\"NSLocalizedDescription\": \"The server responded with an HTTP error code. statusCode: 400\"]",
"request" : {
"headers" : {
"Authorization" : "<redacted>",
"Content-Type" : "application\/x-www-form-urlencoded",
"User-Agent" : "Trello\/2026.14\/20260707.204116 (iPhone; iOS 26.5.2; sv_SE; Scale\/3.00)",
"X-Trello-Background-Sync" : "0",
"X-Trello-Client-Version" : "iOS - 2026.14 (20260707.204116)",
"X-Trello-TraceId" : "000000001c600718d3497d0284d7f533",
"x-trello-task" : "edit-card\/idMembers",
"x-trello-user-access" : "true"
},
"httpMethod" : "POST",
"timeoutInterval" : 60
},
"response" : {
"expectedContentLength" : 29,
"headers" : {
"Access-Control-Allow-Origin" : "*",
"Alt-Svc" : "h3=\":443\"; ma=86400",
"Cache-Control" : "no-store, no-cache, must-revalidate, proxy-revalidate",
"Content-Length" : "29",
"Content-Type" : "text\/plain; charset=utf-8",
"Date" : "Mon, 27 Jul 2026 19:54:14 GMT",
"Expires" : "0",
"Server" : "AtlassianEdge",
"Strict-Transport-Security" : "max-age=63072000; preload",
"Via" : "1.1 64bf55450e9517d21d0d3afad13698b8.cloudfront.net (CloudFront)",
"access-control-allow-headers" : "Authorization, Accept, Content-Type",
"access-control-allow-methods" : "GET, PUT, POST, DELETE",
"access-control-expose-headers" : "x-rate-limit-api-key-interval-ms, x-rate-limit-api-key-max, x-rate-limit-api-key-remaining, x-rate-limit-api-token-interval-ms, x-rate-limit-api-token-max, x-rate-limit-api-token-remaining, retry-after",
"atl-request-id" : "08e50fe5-01e4-4b48-b85f-f58037f8e0df",
"atl-traceid" : "08e50fe501e44b48b85ff58037f8e0df",
"nel" : "{\"failure_fraction\": 0.01, \"include_subdomains\": true, \"max_age\": 600, \"report_to\": \"endpoint-1\"}",
"referrer-policy" : "strict-origin-when-cross-origin",
"report-to" : "{\"endpoints\": [{\"url\": \"https:\/\/dz8aopenkvv6s.cloudfront.net\"}], \"group\": \"endpoint-1\", \"include_subdomains\": true, \"max_age\": 600}",
"server-timing" : "atl-edge;dur=152,atl-edge-internal;dur=8,atl-edge-upstream;dur=145,atl-edge-pop;desc=\"aws-eu-central-1\"",
"surrogate-control" : "no-store",
"x-amz-cf-id" : "irnkcPTXSSvHX1Tc4h0eFeBxwvhGti2bwQbU9yYq-TK8Emk_oVdABQ==",
"x-amz-cf-pop" : "ATH51-P2",
"x-cache" : "Error from cloudfront",
"x-content-type-options" : "nosniff",
"x-dns-prefetch-control" : "off",
"x-download-options" : "noopen",
"x-frame-options" : "DENY",
"x-permitted-cross-domain-policies" : "none",
"x-rate-limit-api-token-interval-ms" : "10000",
"x-rate-limit-api-token-max" : "100",
"x-rate-limit-api-token-remaining" : "98",
"x-rate-limit-db-query-time-interval-ms" : "600000",
"x-rate-limit-db-query-time-max" : "2700000",
"x-rate-limit-db-query-time-remaining" : "2699990",
"x-rate-limit-member-interval-ms" : "10000",
"x-rate-limit-member-max" : "12500",
"x-rate-limit-member-remaining" : "12498",
"x-trello-environment" : "Production",
"x-trello-version" : "1.478129.0",
"x-xss-protection" : "1; mode=block"
},
"mimeType" : "text\/plain",
"statusCode" : 400
},
"urlString" : "https:\/\/trello.com\/1\/cards\/<redacted>\/idMembers"
}
}

[Arkadiusz Wroblewski]

Hello @Magnus Stolpe 

Before escalation, please update from Trello iOS 2026.14 to the currently available 2026.15 release and test it once more.

The release notes mention bug fixes, although they do not specifically mention this reminder problem.

Best,

Arek 🤠