Описание решения проблемы в версии OwnCloud 9.1
to correct the problem with the coding we need to make changes to the file
/ var / www / owncloud / lib / private / Streamer.php
Line 66
Original: $this->streamerInstance->addEmptyDir($rootDir);
Change: $this->streamerInstance->addEmptyDir(iconv("utf-8", "cp866", $rootDir));
Line 69
Original: $this->addFileFromStream($fh, $internalDir . $filename, $filesize);
Change: $this->addFileFromStream($fh, iconv("utf-8", "cp866", $internalDir.$filename), $filesize);
Server configuration[/b]
Operating system: Ubuntu 16.04.01 TLS
Web server: apache
Database: mysql
PHP version: 7
ownCloud version: 9.1
kalinkin_43@mail.ru