[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"problem-detail-error-time-14t14-24z-level-warning-msg-the-tag":3},{"stack":4,"error":5,"seoName":6,"seoStack":7,"seo":8,"breadcrumb":10,"titlePrefix":17,"titleAccent":18,"lead":19,"facts":22,"why":37,"log":55,"fix":76,"engine":96,"related":104,"pitch":111},"compose","time-14t14-24z-level-warning-msg-the-tag","Compose deployment fails because the container image tag is empty","Docker Compose",{"description":9},"Learn what causes Compose deployment fails because the container image tag is empty, how PanelAlpha Engine responds to it during deployment.",[11,14,16],{"label":12,"href":13},"App Installations","\u002Fapps",{"label":7,"href":15},"\u002Fapps\u002Fstacks\u002Fcompose",{"label":6},"Compose deployment fails because ","the container image tag is empty",[20],{"text":21},"Error recorded 1 times in PanelAlpha Engine deploys on Docker Compose. 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,"tooltip":36},"Status","Observed","Our team will look into this soon, verify the cause and try to fix it in an upcoming release.",{"heading":38,"body":39},"Why it happens",[40,42,45,47,49,51,53],{"text":41},"The Compose file references an image ending in ",{"text":43,"code":44},":${TAG}",true,{"text":46},". ",{"text":48,"code":44},"TAG",{"text":50}," was not provided, so Docker tried to pull ",{"text":52,"code":44},"ghcr.io\u002Fvenil7\u002F\u003Caccount>:",{"text":54}," with an invalid empty tag. Other application variables are also unset and may need configuration after the image reference is fixed.",{"heading":56,"block":57},"What the log looks like",{"header":58,"lines":59},"Deploy log",[60,64,68,72],{"segments":61},[62],{"text":63},"Starting application (docker compose up -d)",{"segments":65},[66],{"text":67},"time=\"2026-09-14T14:37:24Z\" level=warning msg=\"The \\\"TAG\\\" variable is not set. Defaulting to a blank string.\"",{"segments":69},[70],{"text":71},"unable to get image 'ghcr.io\u002Fvenil7\u002F\u003Caccount>:': Error response from daemon: invalid reference format",{"segments":73},[74],{"text":75},"Deploy failed: Failed to start app",{"heading":77,"steps":78,"block":93},"How to fix it",[79],[80,82,83,85,87,89,91],{"text":81},"Set ",{"text":48,"code":44},{"text":84}," to a valid image tag in the app environment or Compose configuration. Provide the required ",{"text":86,"code":44},"ASSETS_*",{"text":88}," variables, including the JWT secret and expiry settings. Verify the expanded image name with ",{"text":90,"code":44},"docker compose config",{"text":92},", then redeploy.",{"header":94,"lines":95},"Fix by hand",[],{"heading":97,"body":98,"block":101},"How PanelAlpha Engine solves it",[99],{"text":100},"Before running Compose, detect required variable interpolation and reject empty image tags with a clear configuration error. Redact secrets while listing missing variables and show the resolved image reference that caused the failure.",{"header":102,"lines":103},"",[],{"heading":105,"items":106},"Apps affected",[107],{"title":108,"badge":109,"tone":26,"href":110},"Assets","1 occurrence","\u002Fapps\u002Fvenil7\u002Fassets",{"heading":112,"body":113,"footNote":114,"docsLabel":115,"docsHref":116},"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"]