Hello Odoo Community,

I am facing a frontend error in Odoo 19 Community on my production server. The system throws an OwlError related to the Ace Editor asset (web.ace_lib.min.js) not loading properly.

Here is the full error:

UncaughtPromiseError > OwlError

Uncaught Promise > The following error occurred in onWillStart: "The loading of /web/assets/a4a73cc/web.ace_lib.min.js failed"

Occured on . on 2025-12-02 10:49:26 GMT

OwlError: The following error occurred in onWillStart: "The loading of /web/assets/a4a73cc/web.ace_lib.min.js failed"
    Error
        at wrapError (...)
        at onWillStart (...)
        at CodeEditor.setup (...)
        at new ComponentNode (...)
        at AceField.template (...)
Caused by: AssetsLoadingError: The loading of /web/assets/a4a73cc/web.ace_lib.min.js failed
    Error: The loading of /web/assets/a4a73cc/web.ace_lib.min.js failed
Caused by: [object Event]

What I have tried so far:

• Restarted Odoo service

• Cleared browser cache

• Updated and rebuilt assets

• Checked file permissions

• No custom modules modifying Ace Editor

Symptoms:

• Error happens when Odoo tries to load the code editor (Ace)

• Page does not render correctly

• Issue appears only in production, not on local development

Questions:

1. What causes the web.ace_lib.min.js asset to fail loading in Odoo 19?

2. Could this be due to asset bundling, missing files, CDN blocking, or caching issues?

3. How can I force rebuild all web assets to regenerate this file?

4. Is there a known issue with Ace editor in Odoo 19?

Any help or guidance would be greatly appreciated.

Thank you!