You are using a legacy browser not supporting the Host: header.
Your Request Headers
Array
(
[accept] => */*
[user-agent] => Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
[accept-encoding] => gzip, br, zstd, deflate
[host] => retro.blaatschaap.be
)