Symptoms
-
Unable to update or upgrade Plesk. The following error is shown:
Error: Failed to download the file http://autoinstall-win.plesk.com/PANEL-WIN_17.8.11/dist-windows/plesk-backend_mu008.msi: Operation too slow. Less than 500 bytes/sec transferred the last 30 seconds
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Connection to http://autoinstall-win.plesk.com/ is possible via telnet:
# telnet autoinstall-win.plesk.com 80
Trying xx.xx.xxx.xx...
Connected to autoinstall-win.plesk.com. -
Download from another sources is very slow or not possible as well.
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On Windows, it is not possible to download *.msi files manually via browser, for example the file from the error http://autoinstall-win.plesk.com/PANEL-WIN_17.8.11/dist-windows/plesk-backend_mu008.msi
Cause
Network connection quality or bandwidth issue.
Resolution
Contact ISP provider to fix the issue with the network connection quality or bandwidth.