UPDATE – I fixed it, woo hoo – “Disable All WordPress Updates” Plugin is active on this site. It was stopping the Plain Classes patch from running.  After deactivating, it all worked as expected.


I have a site running Oxygen 4.01 RC1.

After adding my license and activating the tool, the patch process fails.

There is a 404 error for admin.js?ver=1.0.6 in the console. I also don’t see this file inside the “dist” folder.

The console logs:

GET /wp-content/plugins/plain-classes/dist/admin.js?ver=1.0.6

The resource from “/wp-content/plugins/plain-classes/dist/admin.js?ver=1.0.6” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).

Please let me know if you need anything else from me.

Thank you,


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One response to “Wakaloka Plain Classes: Failed to patch Oxygen Builder”

  1. joshua says:

    thanks for reporting, a fixed has been gathered for next update

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