Pomoc TimeZone Error

[Alex]

Please, how to fix this two errors?

Warning: DateTime::createFromFormat(): Invalid date.timezone value 'America/Brasilia', we selected the timezone 'UTC' for now. in /share/CACHEDEV2_DATA/.qpkg/rtorrent/var/www/include/index-jumbo.php on line 8

Warning: strtotime(): Invalid date.timezone value 'America/Brasilia', we selected the timezone 'UTC' for now. in /share/CACHEDEV2_DATA/.qpkg/rtorrent/var/www/include/index-jumbo.php on line 21

Firmware version: 4.3.6.0895 Build 20190328
Model name: QNAP TS-251+

Thanks!