Can't follow sites

Last time because no video is coming anymore, I followed advice to remove all my following sites and re-follow them. This time, I only followed a few of those sites successfully. Most sites, I got errors in my logs:

{"err":{"stack":"RequestError: connect EHOSTUNREACH 185.44.41.201:443\n at ClientRequest.<anonymous> (file:///var/www/peertube/versions/peertube-v8.0.1/node_modules/.pnpm/got@14.6.3/node_modules/got/dist/source/core/index.js:870:107)\n at Object.onceWrapper (node:events:639:26)\n at ClientRequest.emit (node:events:536:35)\n at emitErrorEvent (node:_http_client:101:11)\n at TLSSocket.socketErrorListener (node:_http_client:504:5)\n at TLSSocket.emit (node:events:524:28)\n at emitErrorNT (node:internal/streams/destroy:169:8)\n at emitErrorCloseNT (node:internal/streams/destroy:128:3)\n at process.processTicksAndRejections (node:internal/process/task_queues:82:21)\n at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1611:16)","message":"connect EHOSTUNREACH 185.44.41.201:443","name":"RequestError","requestHeaders":{"user-agent":"PeerTube/8.0.1 (+https://peertube.slat.org)","date":"Mon, 02 Mar 2026 13:48:06 GMT","accept":"application/json","accept-encoding":"gzip, deflate, br","host":"video.ploud.jp"},"requestUrl":"https://video.ploud.jp/.well-known/nodeinfo","requestMethod":"GET"},"level":"warn","message":"Do not follow peertube@video.ploud.jp:443 because we could not find the actor URL (in database or using webfinger)","label":"``peertube.slat.org:443``","timestamp":"2026-03-02T13:48:09.480Z"}

Is this a problem of remote sites? So far I just tried video.ploud.jp and media.fsfe.org and both gave me the same error. Is there anything I can do from my site?

As I see, they are not available and the error clearly states this.

Yes, I can see that. I just wonder… before upgrading my own site, I followed those sites without any problem. Is it because something changed during recent versions so following becomes a problem if not both sites updated to recent version?

Besides, I couldn’t subscribe certain (peertube) account/channels either. Not sure if it is the same problem. A user asked me that he couldn’t follow nextcloud@peertube.nextcloud.com on our site. Couldn’t search it either (no correct results when searching it on our site). Should I file a bug report on github, or is it actually the same problem, that needs both sites upgraded to newest version?

(PS: I could follow nextcloud@peertube.nextcloud.com successfully on my Mastodon site.)