Upgrade to Nextcloud 32
System requirements
PHP 8.1 is now deprecated but still supported.
PHP 8.4 is now supported, but 8.3 is recommended.
Web server configuration
Setup checks do not check for the
X-XSS-Protectionresponse header anymore. It has been removed from Nextcloud’s.htaccessand you may want to adjust your webserver config to not serve it anymore. XSS filtering was supported only until Chromium 78 and similarly old browsers, but had been found to cause more issues, including attack vectors, than it solved. Nowadays, aside of not serving the header at all, the only generally recommended value is0. More context can be found in the OWASP Cheat Sheet Series.