bOption is not defined backend - Can't Add Bundle Items After Upgrade to 184.108.40.206
As the title says after upgrading to Magento 220.127.116.11 I'm getting 'bOption is not defined' when trying to click on 'Add New Option' making me unable to add any bundle items. This also happens when I modify an existing bundle product, and they show fine on the frontend, but blank on the backend.
Tried looking into logs and nothing there. I've downloaded a new copy of Magento 18.104.22.168 and copied a fresh version of adminhtml with no luck also.