MT doesn't load

Author Posts


Hello Sebastian,
I have an issue on 2 sites.
MT doesn’t load Version 7.x
I had to reupload v5.x and restore an old CSS version since all css was wiped out.
After I update to last version again, issue remains. It doesn’t load.
I tried several possibilities (inactivate all plugins, etc) but issue remains.

Uncaught TypeError: Cannot read properties of undefined (reading ‘disabled’) (line 2)
Microthemer discovered a JavaScript error on your site:

Error: Uncaught TypeError: Cannot read properties of undefined (reading ‘disabled’)
URL: /wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,regenerator-runtime,wp-polyfill,wp-hooks&ver=5.8.3 (line 2)
Source: Microthemer interface

I created a staging site if you want to take a look. How can I send you the details?
Thank you,


Hey Antonio,

I’m very sorry for the trouble. I’m glad you were able to restore your settings. Please send access details for the staging site via our secure contact form.

Were you upgrading from version 5 then?


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