Hello,
yes, the problem is caused by the accent on your site name. It seems that PHP doesn't like it.
We'll try to find a workaround for that, in the meantime can you please try to hardcode the site name inside the archiver name? Please avoid using any spaces/accents, otherwise in some platforms (for example Windows) you won't be able to download the file since the operative system doesn't accept it.
Davide Tampellini
Developer and Support Staff
๐ฎ๐นItalian: native ๐ฌ๐งEnglish: good โข ๐ My time zone is Europe / Rome (UTC +1)
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!