I have used the 2010 Weaver theme for many years and like it very much.
It is this website https://kf-oster.net/ (Norway)
But when I was about to upgrade from PHP 7.4 to 8.0 the site crashed. I would really like to know if there is anything I can do about it, or if I have to move to another theme?
The current weaver theme is Weaver Xtreme, you can install it and activate it (along with its Compagnon plugin Xtreme theme support), and you will be in familiar territory with many new feature to support modern mobile device and web design styles