I've recently fixed a bug in recognize that would cause this, so this might not be necessary, but we can add it for good measure.

@marcelklehr can you point to the fix and @adriano-pinaffo can you check if this fix the issue for you?
I would rather fix the issue than silent the error.

here you go: nextcloud/recognize@0fdb558

@artonge @marcelklehr it seems it won't fix the issue because my FacePhoto.php's getMetadata() is already returning the data JSON encoded. See below:

@adriano-pinaffo Could you disable recognize to check whether this bug stems from recognize then?

I disabled Recognize, went back to Photos and CTRL+F5 it... still, Images are not shown

@marcelklehr I had this issue with Photos before installing Memories. Since installing Memories I am able to view the photos there but not in the Photos app.

It might be useful to note, that I only started to get this issue in Photos after I ran files:scan, files:repair-tree, files:cleanup and files:scan-app-data operations with occ after I manually modified the file system. This is probably related.

Update: I fixed it by running occ files:scan --all then occ files:scan --all --generate-metadata, also having updated to 26.0.1 to 26.0.5.

@artonge what do you think still needed or fixed and can be closed?

The code has changed since then. I don't see how the error could occur at the time, and don't see how it could occur now. Feel free to reopen if needed.