Passport Validity

I'm supposed to be flying from the UK to Amsterdam tomorrow with KLM. Everything I've seen online indicates I should be fine with my passport that expires in May 2025, including KLMs own travel document checker. However, after I was unable to check in online, I phoned KLM and they said I need 6 months validity on my passport.

Is this true? Is it worth chancing it at the airport anyway? Any help or advice would be greatly appreciated.

Sincerely,