If the tracker error does not contain the ptt prefix, it is basically a network problem, and it is more likely caused by the operator blocking the relevant website.
There is a problem with the tracker: there is a problem with the client downloading resources
Newly downloaded resources: www.pttime.site will be enabled as the tacker server by default
Downloaded resources: You can confirm whether to manually change to a new domain name based on your resource situation: select all resources in qb, right-click to edit the tracker, and fill in the new tracker: https://www.pttime.site/announce.php?passkey=your original passkey

There is no problem with the tracker
The client already has resources: ignore it.
Newly downloaded resources on the client: automatically use the new domain name.

Do not spread the new domain name to the public network!