[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"problem-detail-error-time-10t21-19z-level-warning-msg-the-acme":3},{"stack":4,"error":5,"seoName":6,"seoStack":7,"seo":8,"breadcrumb":10,"titlePrefix":17,"titleAccent":18,"lead":19,"facts":22,"why":38,"log":52,"fix":73,"engine":82,"related":90,"pitch":97},"express","time-10t21-19z-level-warning-msg-the-acme","Express deploy fails because Compose has an undefined Traefik dependency","Express",{"description":9},"Learn what causes Express deploy fails because Compose has an undefined Traefik dependency, how PanelAlpha Engine responds to it during deployment.",[11,14,16],{"label":12,"href":13},"App Installations","\u002Fapps",{"label":7,"href":15},"\u002Fapps\u002Fstacks\u002Fexpress",{"label":6},"Express deploy fails because ","Compose has an undefined Traefik dependency",[20],{"text":21},"Error recorded 1 times in PanelAlpha Engine deploys on Express. The deploy log below is the recorded failure output.",[23,28,31,33],{"label":24,"value":25,"tone":26,"tooltip":27},"Type","Error","err","An error that occurred in the deployed application. It is not necessarily a PanelAlpha Engine error, but we keep working on improvements so you run into fewer of them.",{"label":29,"value":30},"Seen","1 times",{"label":32,"value":7},"Where",{"label":34,"value":35,"tone":36,"tooltip":37},"Status","Fixed (2.1.0)","ok","Fixed in PanelAlpha Engine 2.1.0. The error is resolved on our side, so you will not run into it anymore.",{"heading":39,"body":40},"Why it happens",[41,43,46,48,50],{"text":42},"The application build completed successfully, but Docker Compose rejected the project during startup. The app service still declares a dependency on ",{"text":44,"code":45},"traefik",true,{"text":47},", while the Express strategy kept or generated a Compose configuration where that service was unavailable. The missing ",{"text":49,"code":45},"ACME_EMAIL",{"text":51}," variable is a warning, but it is not the direct failure.",{"heading":53,"block":54},"What the log looks like",{"header":55,"lines":56},"Deploy log",[57,61,65,69],{"segments":58},[59],{"text":60},"Starting application (docker compose up -d)",{"segments":62},[63],{"text":64},"time=\"2026-09-10T21:29:19Z\" level=warning msg=\"The \\\"ACME_EMAIL\\\" variable is not set. Defaulting to a blank string.\"",{"segments":66},[67],{"text":68},"service \"app\" depends on undefined service \"traefik\": invalid compose project",{"segments":70},[71],{"text":72},"Deploy failed: Failed to start app",{"heading":74,"steps":75,"block":79},"How to fix it",[76],[77],{"text":78},"Fixed in engine 2.1.0. The same repository deploys past this point on engine 2.1.0; this failure no longer occurs. Redeploy the project.",{"header":80,"lines":81},"Fix by hand",[],{"heading":83,"body":84,"block":87},"How PanelAlpha Engine solves it",[85],{"text":86},"Not reproduced on engine 2.1.0 (commit 133832712): redeployed codeberg.org\u002Fladigitale\u002Fdigistorm (partial) on the engine test hosts on 2026-09-30; no new event on this fingerprint.",{"header":88,"lines":89},"",[],{"heading":91,"items":92},"Apps affected",[93],{"title":94,"badge":95,"tone":26,"href":96},"digistorm","1 occurrence","\u002Fapps\u002Fcodeberg.org\u002Fladigitale\u002Fdigistorm",{"heading":98,"body":99,"footNote":100,"docsLabel":101,"docsHref":102},"Try PanelAlpha Engine yourself.","The easiest way to turn your server into a safe, controlled environment for your AI agent. Deploy, manage and maintain any project from Claude Code, Cursor, Codex or any other MCP client. Open source under Apache 2.0, free to run.","Requires Ubuntu 24.04 or 26.04 · 2 GB RAM · 1 CPU","Read the documentation","https:\u002F\u002Fpanelalpha.com\u002Fdocs"]