It looks like there are disk storage issues. I just got the following error when trying to save an edit
Software error:
can’t write into /srv/off/products/506/049/511/6254/7.sto: No space left on device at /srv/off/lib/ProductOpener/Store.pm line 235.
For help, please send mail to the webmaster (contact@openfoodfacts.org), giving this error message and the time and date of the error.
