In addition to my previous post:
1) The problem was with packages larger than 1GB.
2) Hyper-V is a standard component of Windows and is installed through Programs and Features. Use the official manual from Microsoft.
3) You don't need to create any VMs on this Virtual Switch if you don't need them.

Hi everyone!
I'm facing this issues 'Error: Receiving data failed with unity tls error code 7' on any WI-FI connection if package size is < 1Gb. Tried changing Wi-Fi drivers and standards: 802.11b, 802.11g, 802.11n. The 802.11b is most stable, but its speed is incredibly low.
And now the method that helped me (Windows only): install Hyper-V -> go to "Virtual switch manager" -> "New virtual network switch" -> External -> select our Wi-Fi network as "External network" and the "Allow management operating system to share this network adapter" option, after that the Wi-Fi icon in the system tray changed to the standard one for a local network, although it still works as Wi-Fi. And the most important thing is that I downloaded a 5 GB package through Unity Package Manager.
Don't ask how and why it works, I don't know myself, I did it by accident for another task.

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I am facing similar issues.
[Temporary Solution]: - My Laptop had bitdefender anti virus and firewalll in it (turning them off didn't work), but switching to a secondary laptop (in the same network) but without Bitdefender tools solved the issue for me. Had to manually copy the assets downloaded in 2nd laptop to the first, though. So check your Antivirus and its Firewall for a solution. And yes, its very bad that package manager downloads can't resume at this age. Hope this helps - happy coding!

Also having the issue like TAYFUNDOKER, but for the bundles of the much lower size (122KB in my case).

Having this issue on Android devices, while trying to download the asset bundles from AWS S3 bucket.
Log sample:
E/Unity: Curl error 35: Handshake did not perform verification. UnityTls error code: 7

After a retry - the request succeeded. But the issue causes undesired timeouts and reproduces quite often.

Addressables 1.19.4
Unity 2020.3.18f1
Samsung S10 (but same happened with the other devices too)

i am having this issue on addressable bundle downloads. if the bundle is bigger then 20mb it fails on wireless connection.

Actually the issue is just this.

Unity's package manager provides downloads that do not support continuation if the connection drops out. Even if its a micro second the download will fail and respond with a CODE 7 or something similar and then you get to start again.. and again.

The unity package manager should support continuation of a download like almost every other service that runs over the internet.