EDIT: Already answered, no more boosts needed – thanks for your swift actions! 😍
Anyone using the Paperless app?
https://apt.izzysoft.de/packages/eu.bauerj.paperless_app
Its source repo was archived 6/2024, and the app taken off PlayStore. Last release was 2/2022, but the server software most likely moved on – which might have broken compatibility. If that is the case, we'd need to remove the app from #IzzyOnDroid as well, to avoid disappointments for those installing it full of hope.