@julian
Here you are some AP errors from a few days ago, before I made any changes.

2025-02-13T06:25:09.462Z [4567/24115] - error: [activitypub/api] Error
Error: [[error:activitypub.invalid-id]]
    at /home/xxxxxxxx/nodebb/src/api/activitypub.js:42:9
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.follow (/home/xxxxxxxx/nodebb/src/api/activitypub.js:30:5)
    at async Categories.follow (/home/xxxxxxxx/nodebb/src/controllers/write/categories.js:117:2)
    at async /home/xxxxxxxx/nodebb/src/routes/helpers.js:80:5
2025-02-13T06:28:56.552Z [4567/24115] - error: [activitypub/api] Error
Error: [[error:activitypub.invalid-id]]
    at /home/xxxxxxxx/nodebb/src/api/activitypub.js:42:9
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.follow (/home/xxxxxxxx/nodebb/src/api/activitypub.js:30:5)
    at async Categories.follow (/home/xxxxxxxx/nodebb/src/controllers/write/categories.js:117:2)
    at async /home/xxxxxxxx/nodebb/src/routes/helpers.js:80:5
2025-02-13T06:33:19.290Z [4567/24115] - error: [activitypub/api] Error
TypeError: Invalid URL
    at new URL (node:internal/url:804:36)
    at /home/xxxxxxxx/nodebb/src/activitypub/index.js:100:25
    at Array.filter ()
    at ActivityPub.resolveInboxes (/home/xxxxxxxx/nodebb/src/activitypub/index.js:99:13)
    at ActivityPub.send (/home/xxxxxxxx/nodebb/src/activitypub/index.js:373:36)
    at /home/xxxxxxxx/nodebb/src/api/activitypub.js:51:21
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.follow (/home/xxxxxxxx/nodebb/src/api/activitypub.js:30:5)
    at async Categories.follow (/home/xxxxxxxx/nodebb/src/controllers/write/categories.js:117:2)
    at async /home/xxxxxxxx/nodebb/src/routes/helpers.js:80:5
2025-02-13T06:37:05.361Z [4567/24115] - error: [activitypub/api] Error
Error: [[error:activitypub.invalid-id]]
    at /home/xxxxxxxx/nodebb/src/api/activitypub.js:42:9
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.follow (/home/xxxxxxxx/nodebb/src/api/activitypub.js:30:5)
    at async Categories.follow (/home/xxxxxxxx/nodebb/src/controllers/write/categories.js:117:2)
    at async /home/xxxxxxxx/nodebb/src/routes/helpers.js:80:5
2025-02-13T06:37:20.692Z [4567/24115] - error: [activitypub/api] Error
Error: [[error:activitypub.invalid-id]]
    at /home/xxxxxxxx/nodebb/src/api/activitypub.js:42:9
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.follow (/home/xxxxxxxx/nodebb/src/api/activitypub.js:30:5)
    at async Categories.follow (/home/xxxxxxxx/nodebb/src/controllers/write/categories.js:117:2)
    at async /home/xxxxxxxx/nodebb/src/routes/helpers.js:80:5
[cluster] Restarting...

My forum.n66.pl-proxy.conf is now very similar to official recommendations and doesn't seem to have any effect on AP following/sharing capabilities.
I am unaware of server tweaks to facilitate AP following/sharing.

@Jakub-Urbanowicz your ActivityPub user is resolving, but the URLs are incorrect.

Please update your config.json so that it properly reflects your site's url, it should be https://forum.n66.pl, with the https

Hi! I am also having federation issues on a fresh install of 4.0.3. For example, I can not see the content of all the posts here including the original post. I think I see the content of around half of the posts. I tried to reply on another post on community.nodebb.org, but after ten minutes it is still not visible at community.nodebb.org.

Ironically, I am not sure this reply will reach community.nodebb.org either.

@reynir OK great! This one went through. However, I still only see about half of the posts.

(Finally, sorry for barging in on your topic - perhaps we can fork the topic somehow)

@reynir@forum.fedi.dk the post content being blank issue might be an unrelated bug. I'm still trying to figure out that one.

@julian@community.nodebb.org thanks for the reply! Is there a tracking issue I can subscribe to?

(I am having a lot of fun with our new NodeBB instance btw!)

@reynir@forum.fedi.dk there wasn't, so I added one:

Reports of blank posts · Issue #13172 · NodeBB/NodeBB

There are reports of blank posts appearing on NodeBB. They are related to remote posts who have markdown defined. At some point in the logic the post is parsed with the empty content and cached as empty. A NodeBB restart usually temporar...

GitHub (github.com)

@julian That and upgrading to 4.0.4 helped a little – at least direct messages are coming through, but following still not working in either direction. Following seems to be set up correctly and confirmed on both the forum and other AP instances. Testing with Friendica and Mastodon. Only the messages are stopped somewhere.

@julian I am now unable to import threads using the search area. It worked a few days ago (before 4.0.4) and maybe before changing http to https in config.json. Now I can only follow users without actually following their content (no following is operational). While importing threads worked, it was still useless, because I couldn't join in on conversations.
Yesterday I experimented with different proxy_pass values in my nginx proxy.conf file:

• proxy_pass http://forum_n66_pl; – original configuration
• proxy_pass http://127.0.0.1:4567; – no effect on AP behaviour, nodebb's admin privileges affected
• proxy_pass https://forum_n66_pl; – resulted in a "Bad Gateway" error.
  I attach the recent log file: https://u.pcloud.link/publink/show?code=XZun2L5Zy2PaNwGjuh72kxKbh6Wl9jEb4FmX

Please tell me you know how to fix it.

@Jakub-Urbanowicz http://forum_n66_pl this suggests there's an upstream block.

Can you paste your entire nginx config?

@wall_e@ioc.exchange This is done now, consecutive shares are merged.