Every time i try to load any 1.15 versions, including mod packs from twitch, the green loading bar at the bottom of the launcher gets to about half way, slows down considerably and when it finally gets to about 3/4 of the way complete stops and give the message below. I can still run any version below 1.15 without any problems. My internet is solid the whole time and does not drop anywhere near 30 bytes EVER.

"Failed to download file.
Name: da_dk.json
URL: https://resources.download.minecraft.net/79/79cd8c14e68a1f156f567ec3abdbb7bf1aa7883a
Error details: Operation too slow. Less than 30 bytes/sec transferred the last 60 seconds
Filename on disk: 79cd8c14e68a1f156f567ec3abdbb7bf1aa7883a
Path: C:\Users\boyes\AppData\Roaming\.minecraft\assets\objects\79\79cd8c14e68a1f156f567ec3abdbb7bf1aa7883a
Exists: Nonexistent"