[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"problem-detail-error-time-14t17-06z-level-warning-msg-the-assets":3},{"stack":4,"error":5,"seoName":6,"seoStack":7,"seo":8,"breadcrumb":10,"titlePrefix":17,"titleAccent":18,"lead":19,"facts":22,"why":37,"log":47,"fix":68,"engine":77,"related":85,"pitch":92},"compose","time-14t17-06z-level-warning-msg-the-assets","Docker Compose deploy fails because the image tag is empty","Docker Compose",{"description":9},"Learn what causes Docker Compose deploy fails because the 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},"Docker Compose deploy fails because ","the 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],{"text":41},"The Compose configuration references several environment variables that were not provided. The missing TAG variable produces an image name ending in a colon, such as ",{"text":43,"code":44},"ghcr.io\u002Fvenil7\u002F\u003Caccount>:",true,{"text":46},". Docker rejects this as an invalid image reference before the application can start.",{"heading":48,"block":49},"What the log looks like",{"header":50,"lines":51},"Deploy log",[52,56,60,64],{"segments":53},[54],{"text":55},"Starting application (docker compose up -d)",{"segments":57},[58],{"text":59},"time=\"2026-09-14T17:49:06Z\" level=warning msg=\"The \\\"TAG\\\" variable is not set. Defaulting to a blank string.\"",{"segments":61},[62],{"text":63},"unable to get image 'ghcr.io\u002Fvenil7\u002F\u003Caccount>:': Error response from daemon: invalid reference format",{"segments":65},[66],{"text":67},"Deploy failed: Failed to start app",{"heading":69,"steps":70,"block":74},"How to fix it",[71],[72],{"text":73},"Provide the required Compose environment variables through the application configuration or an environment file. Set TAG to a valid image tag and provide the required application settings, including the JWT secret and expiry values. Then redeploy and confirm that the rendered image reference includes a non-empty tag.",{"header":75,"lines":76},"Fix by hand",[],{"heading":78,"body":79,"block":82},"How PanelAlpha Engine solves it",[80],{"text":81},"Compose startup should validate required variables before running Docker Compose, reject empty image tags with a clear configuration error, and avoid passing secrets or required settings as blank defaults.",{"header":83,"lines":84},"",[],{"heading":86,"items":87},"Apps affected",[88],{"title":89,"badge":90,"tone":26,"href":91},"Assets","1 occurrence","\u002Fapps\u002Fvenil7\u002Fassets",{"heading":93,"body":94,"footNote":95,"docsLabel":96,"docsHref":97},"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"]