Do you have a linked, or are you downloading as a free user ?

Use the "Reconnection" button (the two blue arrows icon) to get a fresh IP address from your ISP.

Your firewall, antivirus, or VPN is stripping the connection before it can stabilize.

Many file hosts track how many segments are requested from a single IP address. If you hit a limit, they stop serving segments.

If you are using a Premium account or a Multihoster (like Real-Debrid), the "Segment not loaded" error might indicate an account issue.