I have a 1 year old Tonkinese cat. When she was younger she was known for her toxic flatulence (I swear that she knocked out a golden retriever with her farts).
But after changing her food to Fussy Cat grainfree dry biscuits along with Fussy Cat raw beef mince the farts have disappeared.
The smelly poops may be from her gut not liking the food, I would suggest getting small bags in a few different reputable brands and see what she goes for and try giving a quality pet raw meat as a soft food replacement.
As for the litter it may be too fine for it to cover up everything to her liking, I have used clay litter for years with several cats without issue.
And lastly the tray may not allow enough digging room to cover things. I have used trays with removable raised lips like this one with good results. If you are wanting it enclosed you can get furniture that holds the tray and accessories out of sight but easily accessible for cleaning.
Most of the ones that you can buy from big box stores will do the job as from what I recall to be approved for sale in NZ they have to conform to fire safety standards.
If you are planning on selling eventually, spending a bit more now for the 10 year battery versions might be a good investment.
Have you checked when the last time the extension was updated?
YouTube has gone through a lot of back end changes to try and force people to watch more advertising than videos so it could be that YT has broken the system the extension was using.
This looks like it might be a corrupted database entry.
Trying to post a link to the image using the old.lemmy.world interface causes a problem as well
It looks like someone has posted a malformed image that is causing the issue.