Dear @toddhalfpenny !
I have a similar problem, though I don’t know if it is related. I am running my company website https//konstruktiv-berlin.de with wordpress and the doriyaki theme by elmastudios https://www.elmastudio.de/wordpress-themes/dorayaki/
The theme heavily uses widgets_on_pages but only a very old version 0.0.12 seemed to work and the theme broke whenever I tried upgrading the widgets plugin. Now it seems to me that wordpress changed the way widgets are configured completely. I think wordpress updated automatically to 5.8.2. PHP Version is 5.6.40-57+0~20211119.60+debian9~1.gbp8a9bd1 and it tells me I should update.
All widgets the doriyaki theme is using are marked inactive and the corresponding areas on the webpage are empty.
Could you please help us with this?
Kind regards,
Felix