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400+ real apps (36GB), Over 930 million downloads
New: FreeCAD (Sep 27, 2020)
Not all apps can't update by the updater, so the network connection should not be the problem for this.
Those are errors on two separate servers. Our download server on digital ocean and your local SourceForge mirror. So it's not just something on our end.
Sometimes, the impossible can become possible, if you're awesome!
Is there possible to add an option to choose the mirror? Or auto retries other mirrors if fails. Because I can download them manually from SF.
Just open source.
The closed source apps like the Wise apps in your error aren't from SourceForge. They're from our own download server at Digital Ocean which isn't connected to SourceForge at all (so it was unaffected by their recent outage). If you're still unable to download, it's likely your antivirus on your PC or a firewall is interfering.
But why can I download it from the browser through the link below?
I can even use the updater's links to download it by my browser. Why the updater can't?
It seems this problem only happens on the updater. Is there any solution for the updater?
The updater uses Windows' internet components to do the download, which are entirely separate from the browser you're using. To test it, you must use Internet Explorer (not Edge, Firefox, Chrome, etc). Most likely you either have something mis-configured or your antivirus is only scanning download via Windows' components.