It seems KLM has covered their bases — but can they?? This is what I read on the Paypal page when starting the dispute process:
Message from Koninklijke Luchtvaart Maatschappij N.V.
Dear Passenger, Please visit our website http://www.klm.com to get the latest flight information about Coronavirus. Hereby the situation is minutely monitored so you can get the latest information. We highly recommend making use of the self-service options on our website to change your flight or request a travel voucher. Claims connected to Coronavirus about” KLM service not rendered” can`t be handled on PayPal site, only on KLM site. Thank you for your cooperation.