deepseek-ai/deepseek-harness · error

client-modules: window.__ModuleLoader__.create called after

Error message

client-modules: window.__ModuleLoader__.create called after module-system boot

What it means

Error "client-modules: window.__ModuleLoader__.create called after module-system boot" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/client/modules/src/index.ts:250

 * The boot protocol as index injection rows. The inline registration queue
 * precedes blocking classic scripts for modules' and runtime's ordinary
 * `lib/client.js` artifacts. Its `create()` method materializes the modules
 * bundle, delegates construction to that bundle, and leaves the same facade
 * in live-registration mode. The graph global follows before the shell reads
 * it.
 * @param graph - the composed entry graph.
 * @returns head rows in execution order: queue script, preload scripts, graph global.
 */
export function bootInjections(graph: WebBootGraph): IndexInjection[] {
  const bootstrapId = JSON.stringify(CLIENT_MODULES_ID)
  const queue = `(()=>{
const pendingQueue=[]
window.__ModuleLoader__={
  mode:"queue",
  pendingQueue,
  load(registration){pendingQueue.push(registration)},
  create(options){
    if(this.mode!=="queue")throw new Error("client-modules: window.__ModuleLoader__.create called after module-system boot")
    const index=pendingQueue.findIndex(registration=>registration.id===${bootstrapId})
    const registration=pendingQueue[index]
    if(registration===undefined)throw new Error("client-modules: HTML did not preload ${CLIENT_MODULES_ID}/client.js")
    pendingQueue.splice(index,1)
    const exports=registration.factory(specifier=>{
      throw new Error('client-modules: ${CLIENT_MODULES_ID}/client.js requested external "'+specifier+'" before the module system existed')
    })
    if(typeof exports!=="object"||exports===null||typeof exports.createClientModuleSystem!=="function"||typeof exports.apply!=="function"){
      throw new Error("client-modules: ${CLIENT_MODULES_ID}/client.js did not export the bootstrap module face")
    }
    return exports.createClientModuleSystem(this,{id:registration.id,exports},options)
  }
}
})()`
  const preload = PARSER_PRELOAD_IDS.map(id => graph.entries.find(entry => entry.id === id))
    .filter((entry): entry is WebBootEntry => entry !== undefined)
    .map((entry): IndexInjection => ({ kind: 'script-src', placement: 'head', src: entry.url }))
  return [

View on GitHub (pinned to b150a551b8)

Solutions

1. Call __ModuleLoader__.create before module-system boot completes.

When it happens

Trigger: Thrown at packages/client/modules/src/index.ts:250 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/734927bf36a30840. Report an issue: GitHub.