In essence, when I sort by date and it displays the first page of saves, it seems to just take a long time to display the thumbnails of them and, when I click on them, they take a little while to display the save preview, but when the preview thing shows, it shows the save. Eventually, the thumbnails of each save on one page end up sharing the either the same image, a white X specifically, which I'm guessing is some form of "unable to display thumbnail" thing, or just remain black.
Troubleshooted the wifi and did all the things I could think of that are wifi related, with no apparent improvement. Also closed the powder toy and opened it back up a minute later, with no difference. The problem doesn't seem to be present with the FP, just with the sort by date thing.
This is a server issue, thanks for reporting it. I know what causes it, our infrastructure is kind of bad and we ran out of disk space for thumbnails.
I wasn't expecting to run out of space for a few months, so it is surprising that it happened so suddenly. I just checked last week.
I will run a command to free up some space, by deleting more thumbnails. I'll poke the server admin later to see if there's anything he can do about it. I plan to make some changes later on to store thumbnails in the cloud, not on the server, to alleviate the situation. Also, I will try to check why the server might be slow. I assume it's disk space related, but it could be something else.
This issue is fixed now. There are still a few saves without thumbnails, those saves will have to be reuploaded to make them re-render.
It will still need intervention from the server admin later, because the drive appears to have been lying about the amount of free space. It's also possible it is going bad and wasn't able to write to the last batch of free space. This drive is only used for save renders though, so it isn't anything catastrophic.