Steps to reproduce the issue

1. I go to the back-end (Screenshot: https://prnt.sc/J8f_JI0DWf9k)
2. I enable automatic updates
3. The error appears (Screenshot: https://prnt.sc/9X1Z2hW_NCBb)

Expected result

It should enable automatic updates

Actual result

#"Errore durante la registrazione al servizio di aggiornamento automatico: Client error: GET https://manuelimmobiliare.it/api/index.php/v1/joomlaupdate/healthcheck resulted in a 403 Forbidden response: Just a moment...meta http-equiv="Content-Type" content="text/htm (truncated...) (400)."

System information (as much as possible)

Joomla 5.4
PHP 8.4.13
10.11.14-MariaDB-cll-lve

Additional comments