Hi,
In SPPB v3.x, when adding a custom css to the addon, the css was limited to the addon because every css instruction was prefixed aith the addon id like #sppb-addon-1627584781502 li
In SPPB 4.x, this prefix is gone so in the example above, the li style is applied to the whole page
This is very problematic when you want to nmnigrate because all pages and all addons need to be modified and renders the custom css field useless..
Please fix ASAP in the next release