Updated from 19.4 to 20.12.2 and now my theme doesn't display as expected

[andyt]

I've added openmage-legacy-themes and it's there on my install. The theme now has a lot of differences, and things like reviews (which were hidden using CSS) are now visible. Does anybody have any suggestions as to why this might be the case?

Edit:

So it looks as if the layout XML in my custom theme is no longer inserting my stylesheet into the head tag using action method="addItem".

I have a file [app/design/frontend/ultimo/default/layout/freeborn.xml] which is no longer being honoured. My theme package is ultimo-freeborn. Is there a change between 19.4 and 20.12 that might have caused this?

Thanks,

Andy

[kiatng]

There are a lot of changes from v19 to v20. But the changes shouldn't affect theme and the xml configuration. How did you upgrade? No one has contributed a guide on how to upgrade OpenMage, but you can reference the install guide: https://docs.openmage.org/users/install/use-composer/#configuration

If you have upgraded OpenMage correctly and still have the theme issue, you need to debug the problems one at a time:

1. hidden using CSS) are now visible: this can be easily fix by examining the style sheets in your browser console.
2. layout XML: is the custom module (ultimo) activated? is the xml defined in it etc/config.xml loaded? You can easily verify it by removing an opening tag "<" in one of the xml files (freeborn.xml), refresh your browser, and see if it throws an error. Don't forget to insert the tag back.

If you google for a solution, search as though you are using Magneto 1.9, the solutions should work for OpenMage v19 or v20.