The issue is with the croppie pulgin and will be fixed in the next release
https://github.com/unaio/una/issues/2690

However, to fix it right now, you download UNA 10.1, extract it, rename your current plugins_public/croppie to something like plugins_public/croppie_old and then transfer the plugins_public/croppie  directory from UNA 10.1 to your server. That will fix it too.