Can a seller cancel an order from their side?

I ordered a plush toy for my son. Today I received an email asking me to cancel the order. Can they not do it from their side? I feel like they are up to something because they are still selling them but they have added a shipping cost. What should I do? The email says….

Thank you for shopping with us. Amazon seller ****** has encountered an unexpected problem with completing your order. Message from seller Hello, I’m sorry, our warehouse is on fire, and we can’t help you deliver the goods, can you help me to cancel the order? Can you help click on the order cancellation request? thank you for your help You can send an anonymous message to the seller real email address, by replying to this email. , which does not expose your email address.
If you were contacted inappropriately by the seller, please report this message. We hope to see you again soon. View this message on Amazon