Repeated MIME Type Error on Multiple ENFOLD Sites Using JavaScript Merging

Hi Enfold Team,

We’re seeing a recurring issue across several WordPress websites built using the ENFOLD theme. All of these websites are hosted with SiteGround, and we’re using Enfold’s built-in JavaScript file merging and compression (via Enfold > Performance), not SiteGround’s SG Optimizer plugin for JS handling.

The problem arises with the auto-generated avia-footer-scripts file in the /wp-content/uploads/dynamic_avia/ directory. Occasionally, this file appears to be served with the wrong MIME type (text/html instead of application/javascript), which causes the browser to block it and throw this error:

Refused to execute script from ‘https://example.com/wp-content/uploads/dynamic_avia/avia-footer-scripts-xxxxx.js’ because its MIME type (‘text/html’) is not executable, and strict MIME type checking is enabled.

When we visit the file directly, it displays a “Nothing found” page.

Temporary Fix

We’ve been resolving the issue manually with this process:
1. Go to Enfold > Performance in the WordPress dashboard.
2. Click “Delete old CSS and JS files”.
3. Go to Enfold > Theme Options and click “Save all changes”.
4. Clear browser cache and refresh the site.

This regenerates the file with a new hash and correct MIME type, and the issue resolves.

Our questions:
• Do you know what might be causing this to happen across multiple Enfold-powered sites?
• Is there anything we can do to prevent this from happening again in future?

Thanks again for creating such an excellent theme and offering first-class support — we really appreciate your work.

Many thanks in advance,

Ben