Federated replies not reaching the blog

Hello again! Since I switched to my new hosting in EU, it seems that answers to my blog generated in the fediverse simply can’t reach the blog. I get Like and Retoot notifications, and they appear OK in the Federated Replies widget, but when someone replies on Mastodon, there’s no indication of it in the blog.

See for example this post: https://teknopata.eus/2025/02/tximeleta-efektua-kakaztozenoan-futboleko-senoro-bat-piratekin-haserretu-eta-euskarazko-komunikabide-digitalak-erori/

And its counterpart in Mastodon. I deliberately replied to provoke some reaction, but the reply is not appearing in the blog. https://tkm.eus/@[email protected]/114072420132527961

I suspect this has to do with some host-level restrictions, but I need some detailed info to convince, because tech support on my hosting company is not very prone to make security policy changes at users request.

My guess is this could have something to do with this error that can be found by millions in my error log. Any clue? Thanks in advance!

[Mon Mar 03 14:10:57.112070 2025] [proxy_fcgi:error] [pid 1328036:tid 1328081] [client 82.130.196.214:0] AH01071: Got error 'PHP message: PHP Warning: file_exists(): open_basedir restriction in effect. File(core/post-comments) is not within the allowed path(s): (/usr/home/teknopata:/home/teknopata:/tmp) in /home/teknopata/www/wp-includes/blocks.php on line 735', referer: https://teknopata.eus/wp-admin/index.php

The page I need help with: [log in to see the link]