Why is my wifi tripping ever if I am placed next to the router

Resolve Wi-Fi and Bluetooth issues caused by wireless interference

Recommended settings for Wi-Fi routers and access points - Apple Support

Software on the computer interfering with the download process including AntiVirus Software

Notation: Disabling the AV Software may or may not solve the issue. Removal of the AV Software may increase the chances of the to perform as expected

Running behind a VPN which may increase Packet losses or corruption of the download 

If via wifi too many Other devices using the wifi at the same time reducing the Bandwidth to your computer.