In your ACP at /admin/settings/tags increase the maximum tag count, it seems that feed item has more than 5 tags.

@alfazaz said in Custom Pages Plugin after Upgrade: 1.10.1 Works fine with version 1.10.1

There's no built-in way to do this at the moment, but you could use a userstyle. Something like https://addons.mozilla.org/en-US/firefox/addon/styl-us/ maybe? That would require you know how to use CSS. If you'd like a dark theme in the ACP you could make a feature request on our Github issues page.