I've just tested it again and I still get this message prompted: Could
not be saved because source file could not be read
That's very weird. Can you post the output of
wget
http://download.nus.edu.sg/mirror/tdf/libreoffice/stable/5.3.3/deb/x86_64/LibreOffice_5.3.3_Linux_x86-64_deb.tar.gz
This is the output from wget, it tries over and over to download the file:
--2017-05-16 10:24:28-- (try: 2) http://download.nus.edu.sg/mirror/tdf/libreoffice/stable/5.3.3/deb/x86_64/LibreOffice_5.3.3_Linux_x86-64_deb.tar.gz
Connecting to download.nus.edu.sg (download.nus.edu.sg)|137.132.155.168|:80... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 275995003 (263M), 275986511 (263M) remaining [application/octet-stream]
Saving to: 'LibreOffice_5.3.3_Linux_x86-64_deb.tar.gz'
LibreOffice_5.3.3_L 0%[ ] 16.55K --.-KB/s in 0.005s
2017-05-16 10:24:29 (1.65 MB/s) - Connection closed at byte 16946. Retrying.
--2017-05-16 10:24:31-- (try: 3) http://download.nus.edu.sg/mirror/tdf/libreoffice/stable/5.3.3/deb/x86_64/LibreOffice_5.3.3_Linux_x86-64_deb.tar.gz
Connecting to download.nus.edu.sg (download.nus.edu.sg)|137.132.155.168|:80... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 275995003 (263M), 275978057 (263M) remaining [application/octet-stream]
Saving to: 'LibreOffice_5.3.3_Linux_x86-64_deb.tar.gz'
LibreOffice_5.3.3_L 0%[ ] 24.80K --.-KB/s in 0.005s
2017-05-16 10:24:31 (1.59 MB/s) - Connection closed at byte 25399. Retrying.